Questions tagged [virus]

For questions about how viruses influence your health. General questions about viruses are off-topic but might be asked on Biology Stack Exchange; for questions about computer viruses, try Super User or Security Stack Exchange.

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33
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5answers
14k views

Does COVID-19 have a case fatality rate of 41%? Is this formula correct?

According to the data on the Johns Hopkins Coronavirus Tracker, as of 3rd February 2020 there were 17491 confirmed cases of COVID-19 globally, 536 total recoveries and 362 deaths. From my non-expert ...
10
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2answers
261 views

STI vs STD vs Sexually Transmitted Virus

I am very confused as in my answer to Why is HIV singled out from other STIs? I agreed with the OP that HIV is an STI. I have been led to believe the following definitions: STI Stands for Sexually ...
21
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2answers
1k views

What is the main way COVID-19 spreads?

Reading numerous news articles about COVID-19, I got confused as to what is its main transmission route. In particular, I am confused as to whether it is direct landing of respiratory droplets in ...
4
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1answer
119 views

Would symptoms differ from eating virus contaminated food versus breathing in virus?

Would symptoms differ from eating virus contaminated food versus breathing in virus? Would symptoms be a good indicator where the virus is located? The COVID-19 causes respiratory symptoms and I guess ...
3
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1answer
606 views

In a viral infection, which symptoms are caused by the virus itself, and which symptoms are caused by the body fighting the virus? [closed]

Most symptoms commonly associated with respiratory viral infections, like the common cold, are actually immune in nature. Fever is the body's attempt to overheat the virus, excess mucous is the body's ...
2
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2answers
115 views

Is it possible to get Covid-19 and have 0 symptoms along the complete journey and hence cure by yourself without knowing?

In this link, in the section How long is it between when a person is exposed to the virus and when they start showing symptoms? mentions Recently published research found that on average, the time ...
4
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1answer
260 views

Who came up with the SARS-CoV-2 name?

I know that the WHO came up with the COVID-19 name, but I see big publisher (Springer) also using "SARS-CoV-2" seemingly to refer to the same thing. To be more technically correct, they say the ...
4
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1answer
232 views

What are the limits on the amount of pathogens that a body can be immune to at any given time?

Before the seasonal flu vaccine was recommended for all healthy adults, people in developed countries might get vaccinated against on the order of 10 different pathogens and develop immunity for some ...
1
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1answer
89 views

Are virus strains different viruses?

This question comes about from another virology question concerning the common cold (Would being infected with every kind of cold virus strain at once be a good immunization or dangerous?). The ...
13
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1answer
1k views

2019 Novel Coronavirus (nCoV) lifetime outside an organism

How long will it remain potent outside an organism? I'm thinking in the context of if it can survive a couple of weeks or a month in the mail for the recipient to get infected. Edit: I tried ...
6
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3answers
2k views

Does bleach have to be diluted to be more effective to kill virus?

This page Bleach claims Bleach is more effective at killing germs when diluted than when used straight out of the bottle. this other page (Spanish) Alcohol and Bleach are more effective against ...
20
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2answers
360 views

Is HIV the cause of AIDS?

That HIV causes AIDS always seemed like an obvious fact to me, this seemed to be the widely accepted opinion. But just now I found the article "Questioning the HIV-AIDS hypothesis: 30 years of dissent"...
7
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1answer
72 views

How can there be a level of HIV viral load that will make infecting others impossible?

I just read about a court case where someone was acquitted for "being dangerous to the surrounding" by having unprotected sex when diagnosed with HIV. The reasoning was that since this person was ...
5
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1answer
91 views

Does viral load of the initial COVID-19 infection affect its severity?

If someone gets infected by a droplet containing a high load of the SARS-CoV-2 virus would he be more likely to develop more severe symptoms compared to someone who gets infected by a droplet ...
2
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1answer
250 views

Why are some viruses harder to make vaccines for?

A number of common viral disease agents have vaccines produced for them: Hepatitis B, Diphtheria, Influenza (flu), Varicella (chicken pox), Poliovirus (polio), and many more. But many very serious or ...
0
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0answers
53 views

How virus is distinguished by PCR test (different mutations/types? of sars-cov-2)?

I've done web search and did not find anything particular right away. Wikipedia articles are rather lengthy and I was not able to understand answer to my question. I've read yesterday there two types ...
9
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0answers
155 views

Is there any figure about the accuracy of COVID-19 tests? [duplicate]

Recently I saw the local media (Romania) presenting a case that was initially considered COVID-19 positive and two subsequent tests led to negative results. As far as I know no official bothered to ...
8
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2answers
221 views

What's the cutoff age for concern with the Zika virus in infants?

CNN is reporting that there is a potentially serious outbreak of this "Zika virus." From all the blogs and articles out there on Zika, it is obvious that this virus is a serious threat to pregnant ...
5
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1answer
646 views

What happens to viruses that causes them to die?

It's been said that SARS-CoV-2 can remain on surfaces up to 9 or 10 days. While I read that smallpox can survive out of a host even for years. As much as I know, since viruses are only protein ...
5
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2answers
114 views

Is there a virus from which humans can recover, but which doesn't grant long lasting immunity?

Prior to the SARS-CoV-2 epidemic I was under the impression that viruses fall into two categories: Diseases from which you recover and afterwards become fully immune. When reinfected with a mutated ...
4
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3answers
2k views

Are motorcycle helmets effective in preventing Corona?

Can a full-head helmet with the visor closed prevent getting infected by the Corona virus during a casual interaction with a carrier? For example, when buying something at a store or discussing ...
4
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1answer
35 views

What receptors are targeted by the seasonal coronaviruses that primarily present as winter colds?

We know that SARS-CoV-2 appears to mainly attack animal cells by the ACE2 receptor, MERS-CoV by the DPP-4 receptor, and SARS-CoV also by the ACE2 receptor. Do we know what receptors are targeted by ...
2
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1answer
130 views

Why isn't saliva sampling used when sampling for the presence of respiratory diseases?

Previously I've asked a question focused on COVID-19: Why did countries initially presume that detecting COVID-19 requires a deep nasal swab? @Fizz provided the following response: So clearly it was ...
1
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1answer
72 views

Are there any epidemiological or laboratory studies on the effectiveness of variolation?

Variolation has been brought up in some circles nowadays as a proposal to deal with the Covid-19 crisis (sometimes by invoking the glorious/revolutionary American past). Looking at the aforementioned ...
1
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2answers
121 views

Why recovered patients develop lung disease due Covid-19?

In this link https://www.dw.com/en/covid-19-recovered-patients-have-partially-reduced-lung-function/a-52859671 we can see Now researchers in Hong Kong have said that recovered coronavirus patients ...
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0answers
93 views

Why would someone, healthy and 10-39 years old, infected with covid-19 might die?

From https://ourworldindata.org/coronavirus we can see that a person between 10 and 39 years old has a probability of 0.2% of dying, which is very low but meaningful. See also this table below for ...
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0answers
19 views

Study type/design used in an coronavirus article?

I came across an article given here While I was reading the article, I wasn't able to find the study type/ design? Can you please help me find out what is the study design/type here? Meaning we ...
0
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1answer
488 views

Can wearing a mask when sick help fight off infection?

I keep reading that at least in the case of viruses humidifiers and warmer air can kill viruses, especially if you have sinusitis. I was thinking that if you wear a mask you would achieve both higher ...