Questions tagged [covid-19]

Describes the clinical disease caused by the SARS-CoV-2 virus

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What is the Fatality Rate of the Common Cold?

During COVID-19, we've heard many comparisons between SARS-CoV-2 and the Flu, especially in terms of the case fatality rate (CFR). Currently, the Flu is thought to be around 0.1%, and according to the ...
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Is there a standard projection (or ensemble of proyections) about whether a second wave of COVID-19 will occur?

Several countries and states are leaving or have partially left the lockdown and, with constraints, are recovering economical activity after getting hit by the covid-19 crisis. WHO has warned that ...
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Confusion regarding death rate of covid19? 2% 0r 12%? [duplicate]

Worldometer is a popular website It mentions percentage of critical cases as 2% It also mentions that in closed cases, 12% cases resulted in death So what is to be considered death rate? 2% or 12?
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False Positive PCR - COVID-19 and possible reinfection when antibodies value is +7.0

A friend of mine was detected COVID-19 positive through PCR one month back. He was asymptotic as per doctors and had no symptoms. He quarantined himself and increased his intake of water. After 1 ...
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Is the SARS-CoV-2 that causes COVID-19 the only known virus that enters the cells via the ACE2 receptors?

I am just curious if the virus is unique in the sense that it enters the ACE2 receptors in the human body and kills the cell. This receptor is located over the entire body. Is this the only virus ...
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Is there any information on the lifespan of SARS-CoV-2 antibodies?

Like all cells, antibodies die off after a period of time. A human body may (or not) be able to efficiently replace or replicate these antibodies. Whether the original antibodies were generated ...
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Are there ways to avoid testing positive for COVID-19? [closed]

Some people with mild or no symptoms may worry that testing positive for COVID-19 could keep them from being able to work or travel. Rumours are spreading that it's possible to "cheat" the test. For ...
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Social Distancing Groups at Beaches and similar large venues [closed]

Government agencies (for this conversation, assume USA) have provided guidance to prevent COVID-19 transmission. As it is a holiday, many lockdown weary have flocked to the beaches and similar venues....
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Has China announced any results from their massive (new) COVID-19 testing program in Wuhan?

About 10 days ago China announced a plan to test the entire population (~11 million) of Wuhan. And more recently they've announced testing over 1 million per day in the city. But have any results been ...
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Why is the reported number of COVID-19 deaths lower on Sundays and Mondays in the US?

I was looking at the Daily Deaths from COVID-19 from Worldometers and I noticed that the number is always lower on Sundays and Mondays. Why is that? Am I interpreting the graphs correctly?
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Is it helpful for the average citizen (non medical professionals) to wear gloves and disinfect them instead of disinfecting the bare hands?

In the last months I have seen lots of articles about wearing masks and gloves to prevent the infecting yourself or others. In the case of the masks this is quite clear that we should wear them, but ...
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Factors of infection rate

I refer to J.H. Jones' Notes on R0. Preliminaries The standard SIR model consists of a system of three differential equations ds/dt = -βsi di/dt = βsi - νi dr/dt = νi for the fractions s, i, r ...
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Why does CDC's RT-PCR protocol for Covid-19 use the N gene, but the Charite one the E gene and RdRp?

The Charite protocol mentioned among other things that Of note, the N gene assay also performed well but was not subjected to intensive further validation because it was slightly less sensitive. ...
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Confirmed, recovered, deaths, meaning

I am wondering about the exact definition of a few terms that are being used in connection with the COVID-19, specifically in data sets. I am interested in the data at github specifically in the time ...
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Source of data for US suicides (by month or quarter) 2019 vs. 2020 [migrated]

In attempt to answer the question: " Have US suicides increased in March/April 2020 compared to 2019 ?". I've been unable to find any published US data for either 2019 or 2020. Do any of our SE ...
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How do the effects of Influenza differ from COVID-19 in any given human being? [closed]

There has been a lot of talk about how COVID-19 is transmitted, what its symptoms are, what its incubation period is etc. However what I am interested in, is: If person 'X' has contracted Influenza ...
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Are there diseases for which infection does not grant lasting immunity but a vaccine does?

There has been a lot of discussion about whether people who have COVID-19 and recover will have long-lasting immunity. At the same time, work is underway to create a vaccine for this disease. But if ...
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Can concentrating our R0 increasing behaviors lead to a lower R0 than spreading the same behaviours out over time?

R0 depends both on behaviors that lead to infecting others and behaviors that lead to being infected. In the case of COVID-19 these are largely the same behaviors, with the difference being that you ...
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Have clusters of Covid-19 cases been linked to supermarkets?

BBC news about a traditional Indian vegetable market (mandi) as spreading ground for Covid-19: Koyambedu: India's coronavirus cluster at a vegetable market [...] On 8 May, Tamil Nadu officials ...
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Studies regarding the spraying disinfectants on the streets being [in]effective against Covid-19 or other viruses?

A quoted by CNN, the WHO recently took the the position that these measures, despite being seen/practiced in some countries, are largely ineffective (and also dangerous if people are directly exposed ...
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Is there a possibility of transmission of COVID-19 during sample collection process?

Is there a possibility of transmission of COVID-19 during sample collection process from safety kits worn by sample collecting person to the suspected infected person whose sample is being collected? ...
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Why has covid-19 death rate reduce over the months?

I have been following the COVID-19 news for quite some time now and there is this one thing which is just bugging my head. When I first started seeing the statistics, the death rate was at around 15% ...
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Have there been any studies on how long COVID-19 remains infectious on various types of cloth?

I was thinking common items like wool and cotton clothing. Has any one discovered yet how long COVID-19 remains infectious on clothing? I have seen the usual items such as paper boxs, stainless ...
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Can the specificity of a COVID-19 antibody test be improved by testing twice?

My question is fairly simple: There is a COVID-19 antibody test with a worst-case specificity of 98%, meaning that it yields potentially up to 2% false positives. While that number is not bad it is ...
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Doctor giving nurse advice its okay to visit family during COVID19 pandemic - Is this safe? [closed]

My sister is a nurse in Labor and Delivery and for the past 3 months we have advised her to stay away from our parents (60 and 61) due to the potential risks with COVID-19. Recently the lead doctor ...
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Do we need pcr test before all endoscopies in covid days [closed]

I am an anaesthetist, patients of endoscopy department are ambulatory patients, they dont want to wait the test results, is the pcr test necessary for these patients before the endoscopy procedures
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MHC haplotypes and COVID-19 [closed]

Have there been any studies done looking at samples of MHC haplotypes in patients infected with SARS-CoV-2? It would be interesting to see if certain HLA polymorphisms are associated with more ...
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Do we need thorax ct before all operations in covid days [closed]

I am an anaesthetist,is pcr enough or do we have to look at the thorax tomography before surgeries
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How to sanitize “medicine” pills tablet strips that you need to use immediately or soon given the outlined issues?

How to sanitize "medicine" pills tablet strips that you need to use immediately or soon given the outlined issues? Medicine strips containing (tablets/ pills & capsules) we've done the ...
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Testing vs transmissibility of COVID-19 [closed]

For a person infected with COVID-19, what generally is the period of time where: they are capable of infecting others? they will test postive for the disease? In particular, I'm curious if a window ...
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What is the goal of current US lockdown measures? [closed]

In March 2020 in the US, in my opinion, lockdown measures were clearly motivated and explained: the goal is to avoid overwhelming the health care system, and the method was to use lockdowns and other ...
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Could suppressing your cough help fight a viral infection like COVID-19?

We know that viral infections colonise the body by reproducing inside of target cells, then releasing the viral payload when the cell dies, which goes on to infect more target cells. We know that a ...
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Have any conclusions been made regarding the interaction of Covid-19 and ACE inhibitor medications? [duplicate]

About two months ago, I started to see articles appear regarding the potential interactions between ACE inhibitor medications (commonly used to treat high blood pressure) and the severity of Covid-19 ...
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Has World Health Organization provided nutrition/diet/exercise guidelines to strengthen the human immune system for better responding to COVID-19?

Medical sciences is not my subject but my personal feeling is that: A strengthen immune system can better respond to viruses than a weak immune system. A balanced diet in combination with exercise ...
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How effective is eucalyptus-based treatment for curing COVID-19 (or coronavirus in general)?

According to The Jakarta Post, (Indonesia's) Agriculture Ministry claims to have developed eucalyptus-based COVID-19 treatment: The Agriculture Ministry has developed a eucalyptus-based treatment ...
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What does it mean to say a population has “low levels of general immunity”?

The UN Humanitarian Coordinator in Yemen, Lisa Grande, is quoted in several places (e.g. this CBS news article as saying (emphasis mine): [SARS-CoV-2] is now in Yemen and may quickly spread. […] ...
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What information we have about transmission of COVID-19 in detail?

A lot of information we have how the COVID-19 virus spreads in general. But what do we know about the detected and proven way of transmission: about which items (door handles, plates, salad bar, ...) ...
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What percentage of Americans believe chloroquine is effective against Covid-19?

As reported in Science last month, after French president Macron traveled to Marseille to meed Didier Raoult, A survey released by French polling institute IFOP on 6 April revealed that 59% of the ...
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What data and research is available on the mortality risk (infection fatality rate) of COVID-19?

As controversy and confusion continues over aspects of COVID-19, particularly over comparisons and contrasts with seasonal flu, I am looking for data and findings on the mortality risk (Infection ...
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How often is a Ct of 30 (or more) using the Charité protocol a false positive for Covid-19?

A French case report that has received widespread media attention suggests (actually stated in pretty strong terms in the paper) that Covid-19 was already spreading in France in December 2019. (In ...
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What would it be like to participate in a (coronavirus) challenge trial, in the US?

I am strongly considering volunteering for any COVID human challenge trial that becomes available near me (midwestern United States). I am willing to undergo long-term isolation. However, I am not ...
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What is the minimal infectious dose (MID) of SARS-CoV-2?

Assuming the immune system is healthy, How much SARS-CoV-2 virus (cause of COVID-19) is required to make a person sick? This might also depend on time, if it was a high infectious dose but just some ...
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Is there a graph over time of Covid-19 test positivity rate in the US?

Back in mid-April some commentary/news was that the US was not doing enough testing as evidenced by the test positivity rate: America’s 20 percent positivity rate is disquieting. The U.S. did ...
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Why will there be vaccines first before a cure for COVID-19?

I found this link on the internet: 70 vaccines are getting ready for coronavirus: 3 very promising Why is it that there will be vaccines before a cure? Shouldn't it be the other way around? What is ...
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Probability of COVID-19 spread [closed]

Is it possible (or reasonable) to calculate the probability of COVID-19 carrier who is asymptomatic infecting more number of persons it comes in contact with than a symptomatic carrier would do during ...
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How it is even possible to compare those groups?

In this publication 36 patients, 16 in control group (31,25% were kids (!!!!) 10-16 y.o., 25% asymptomatic, 62,5% URTI and 12,5% LRTI), 14 in HCQ (14,3% were asymptomatic, 71,4% with URTI and 14,3% ...
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Asymptomatic People

Something I never understood: Does "asymptomatic" mean that someone will never show symptoms whether they catch the disease and therefore, can have without even realizing? Does it mean that they won'...
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Why shall I wash my mask but not my clothes? [closed]

Due to the Covid-19 pandemic, we citizens are asked to wear masks in Germany. Early reports said that wearing a mask may not help to protect myself from other infected people, but it protects others ...
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COVID-19: Is it possible to use the specimen collected through swabs for multiple tests

I am an engineer and currently doing some modeling of COVID-19 testing from a math perspective. I was reading through COVID-19 articles related to testing and I had the following doubt: If a ...
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What do we know about the connection between SARS-CoV-2 and meat plants? [closed]

In the last days we get news from all over the world that "meat plants" are severely hit by Covid-19 outbreaks (Ireland, Poland, Canada, US). We also know that the "wet market" in Wuhan played a ...

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