Franck Dernoncourt
  • Member for 6 years, 10 months
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Why is a (simple) mask not recommended for asymptomatic COVID-19 patients?
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7 votes

TL;DR: please WEAR A MASK! (unless your nearby hospitals are out of it, in which case give your masks to them and stay at home) The link you mentioned provides the reason that the CDC likely has in ...

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How do we know that the Spanish flu was an influenza?
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6 votes

Because we know its genomic sequence. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2720273/: Using fixed and frozen lung tissue of 1918 influenza victims, the complete genomic sequence of the 1918 ...

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Given that reinfection is possible with the flu viruses, why didn't the 1918 flu pandemic last forever?
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4 votes

https://www.washingtonpost.com/history/2020/09/01/1918-flu-pandemic-end/ explains the 1918 flu strain became weaker and similar to typical seasonal flu: Over time, those who contracted the virus ...

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What happens to viruses that causes them to die?
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4 votes

TL;DR: Factors such as UV light and heat causes the mix of RNA, fatty membrane, and protein making up the viruses to steadily break down. More details: https://www.sciencefocus.com/nature/do-viruses-...

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What are the risk factors currently thought important for disease severity in COVID-19?
3 votes

From https://www.businessinsider.com/us-coronavirus-hospitalizations-underlying-health-conditions-cdc-2020-3 (mirror 1, mirror 2): Transcription... Counts are among the 7162 cases with completed ...

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What is the lifetime incidence for tendinopathy for regular humans?
2 votes

My estimate is ~25% of lifetime incidence for tendinopathy in the general population based on the following 2 studies. The lifetime incidence for Achilles tendinopathy in 6% in the general population ...

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Necessity of flu shots under pandemic living conditions
2 votes

Could the case be made for the flu shot still being necessary if living conditions return to normal for the second half of the season Yes, one argument would be that even with the current precautions,...

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What is the required vaccination percentage of a 330M population to achieve herd immunity?
2 votes

Is there a minimum percentage that will produce herd immunity? Answer from the WHO (mirror): The percentage of people who need to have antibodies in order to achieve herd immunity against a ...

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Why don't we take a random sample of the population to estimate the amount of COVID-19 cases?
2 votes

why not take a random sample of a few thousand people people, and test all of them to see how many of them have the virus? Iceland did it, see https://english.alarabiya.net/en/features/2020/03/25/...

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what is the difference between clinical trial study and clinical study?
2 votes

From https://clinicaltrials.gov/ct2/about-studies/learn#WhatIs: A clinical study involves research using human volunteers (also called participants) that is intended to add to medical knowledge. ...

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Is South Korea doing "random" testing to combat covid-19 epidemic?
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2 votes

Is SK conducting random covid-19 tests on sizeable random samples of its population? Not currently (source: South Korean friends). Is any other country with a major outbreak doing such a thing? ...

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Why is the US not implementing large scale random Covid-19 testing to isolate asymptomatic people?
2 votes

Why is surveillance not implemented at scale in the USA? Not enough test kits. If the USA does not have testing at scale, why is this the case? Didn't go through MERS and SARS, unlike South Korea....

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Can computer programmers help to find a vaccine against corona?
2 votes

https://www.kaggle.com/allen-institute-for-ai/CORD-19-research-challenge/tasks is hosting such a "competition" based on scientific papers related to covid-19. You can find many notebooks showing what ...

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Has the Covid-19 prevalence study on entire population of Vò been formally published somewhere?
2 votes

As far I know, no. Only an open letter has been published so far: https://corrierefiorentino.corriere.it/firenze/notizie/cronaca/20_marzo_15/dobbiamo-cambiare-rotta-ef23a500-669a-11ea-a40a-...

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Steps to ensure incoming foods from many grocery bags do not carry COVID-19 virus into the Refrigerator, Kitchen, Home?
2 votes

The video https://youtu.be/sjDuwc9KBps from Jeffrey VanWingen, MD, summarizes methods for safe grocery shopping and cleaning during COVID-19. The main ideas are summarized in https://wgntv.com/news/...

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Why do shave biopsies and punch biopsies used to diagnose suspected facial basal cell carcinomas measure a few mm instead of being below 1mm?
1 votes

A basal cell carcinoma (BCC) may have more than 1 subtype: if the biopsy is too small, the histopathologist may miss a subtype. From {1}: More than 26 different subtypes of BCC appear in the ...

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what does 95% effectivenes mean for vaccines (covid)
1 votes

Does this mean that if you get vaccinated with AstraZeneca for example, then assuming above numbers, there is 5% chance you will get the virus? No. {1} gives a clear example to understand the ...

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Is there any live tracker following the adverse events for COVID-19 vaccines?
1 votes

Liam Goldstein pointed me to the Vaccine Adverse Event Reporting System (VAERS) in the United States. https://vaers.hhs.gov/faq.html#collapse17: Healthcare providers [in the United States] are ...

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Do 50% of individuals with a history of BCC will develop another one within 5 years of diagnosis regardless of the age of the individual?
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1 votes

The 2010 study {1} reviewed a few existing studies and seems to lean toward age as not having an impact on the recurrence rate (however, note that 1 of the reviewed studies does indicate youth+female ...

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Taking resveratrol and NMN supplements
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1 votes

Are there any scientific studies about the effects of them for a healthy person at different ages? Regarding NMN: study {1} shows it is safe to use on humans, but no study yet on the efficiency in ...

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Which criteria are used to choose whether to perform a shave biopsy or a punch biopsy to diagnose suspected facial basal cell carcinomas?
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1 votes

https://emedicine.medscape.com/article/276624-workup#c8 (mirror) explains that using a shave biopsy is the typical biopsy to use but a punch biopsy is preferable in some situations: A skin biopsy is ...

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Definition of 'transmission onset' in this paper
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1 votes

The transmission onset of an individual is the time when the individual first contaminated someone else, as defined in the paper you mentioned, section Procedures, first paragraph, P_j definition:

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Is there any COVID-19 LIVE web-api available?
1 votes

List from https://github.com/Bost/corona_cases/blob/master/web-services.sh: #!/usr/bin/env bash # A list of web services providing JSON data # see also https://github.com/soroushchehresa/awesome-...

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What are the special medications to treat Covid-19?
1 votes

https://www.genengnews.com/a-lists/how-to-conquer-coronavirus-top-35-treatments-in-development/ has a list of 35 treatments being considered / in development. A new survey by Genetic Engineering &...

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

From {1}: In COVID-19, The University of Padua, Veneto Region and the Red Cross tested the populationof Vò, Italy, 3300 people, to establish the natural history of the virus, the transmission ...

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COVID-19 disinfection with ultraviolet
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1 votes

From {1}: [The SARS-CoV-2 virus virus] will be killed by UV, estimated survival in direct sunlight is 10% after 2–3h exposure 90% of flu virus dies after 6h sunlight at spring equinox (3/21) at Bay ...

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Are there any downsides in getting vaccinated with the Pfizer or Moderna COVID vaccine after having received the Johnson & Johnson's COVID-19 vaccine?
0 votes

No downside known so far. Getting a booster shot after having received the Johnson & Johnson's Janssen COVID-19 Vaccine has been more thoroughly studied, as summarized in https://abcnews.go.com/US/...

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What is the difference in cosmesis of the treatment of a seborrheic keratosis between cryotherapy and curettage?
0 votes

Summary: there exist a few more recent studies but they all have a small sample size (<35 patients) and there's no clear trend as to which treatment is the best: both curettage+electrodesiccation ...

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What are the websites providing medical articles?
0 votes

Google Scholar is another good place to try to find a freely available PDF for a given article. https://www.medrxiv.org/: preprints of medical papers https://www.biorxiv.org/: preprints of biology ...

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Are there any central trackers for COVID-19 trials?
0 votes

One more tracker for COVID-19 trials: https://covid19.trackvaccines.org/trials-vaccines-by-country/ (mirror).

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