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Questions tagged [covid-19]

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

Covid-19 is the clinical disease caused by the SARS-CoV-2 virus. It is mostly a respiratory transmitted infection causing a viral pneumonia that can lead to an Acute Respiratory Distress Syndrome similar to that of SARS. However, it has significant differences in transmissibility that have made it far more widespread though case fatality is much lower.

From Coronavirus disease (COVID-19):

Most people infected with the virus will experience mild to moderate respiratory illness and recover without requiring special treatment. However, some will become seriously ill and require medical attention. Older people and those with underlying medical conditions like cardiovascular disease, diabetes, chronic respiratory disease, or cancer are more likely to develop serious illness. Anyone can get sick with COVID-19 and become seriously ill or die at any age.

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How accurate are coronavirus tests?

As of time of writing it's quite common to see headlines about so-and-so who have tested positive for Covid-19, e.g. Canadian PM Justin Trudeau's wife, Sophie, tests positive for coronavirus, officials say However, these articles don't usually say…
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COVID-19 mutation nomenclature

Consider: Source: Where Do COVID Vaccines Stand Against the Variants? The nomenclature seems to follow a hierarchical pattern. What does the first letter and the subsequent numbers indicate? Location of the mutation?
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Is there any identified policy Australia is doing to successfully control the covid-19 pandemic and have no deaths, other countries aren't using?

According to, Australia COVID Australia had 3 deaths for covid-19 in the last 8 months, and they succesfully controlled the pandemic at least 9 months ago, 3 months before starting vaccinations. Nowadays they barely have 26.9 vaccine doses…
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How/when can a doctor say that someone will no longer transmit Covid?

Source This may sound like yet another anti-trump post, but, really I am more concerned for my own health, and that of my family. He is just an easily accessible example (feel free to migrate this to a medical site, if we have one). Inevitably, some…
Mawg says reinstate Monica
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Why does COVID-19 appear more infectious than SARS?

The COVID-19 R0 factor is 2-3, while SARS had an R0 factor of 2-5. However, COVID-19 has infected around 130,000 people and growing, while SARS totalled just under 9000 people infected. Why is COVID-19 spreading faster and wider than SARS? What…
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What protects Chinese provinces other than Hubei from COVID-19 outbreak?

In China, the largest number of reported COVID-19 infections was in Hubei province. Other countries are experiencing exponential increase in reported infections, while the remainder of China is reporting relatively small numbers of…
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For what definition of "significant" is it true that "99 percent of [Covid-19] infected people have no significant illness from it"?

Hoover-affiliated physician Scott W. Atlas wrote: More importantly, it was never a policy goal to eliminate all cases of COVID-19. That is impossible, unnecessary and illogical, when 99 percent of infected people have no significant illness from…
the gods from engineering
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What are the clinical presentations of COVID-19 in Children, and what hypotheses are there to explain their relative immunity to fatal disease?

Out of nearly 45,000 confirmed cases in China through February 11, there was only one death in someone younger than 20, according to the Chinese Center for Disease Control and Prevention, and no deaths among children younger than 10. Out of 731…
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Do we have scientific evidence of immunity to SARS-CoV-2 at all?

There is still no scientific evidence of immunity to SARS-CoV-2, the novel coronavirus. The serious virologist say: “We don’t know yet “ ... “we can’t say “ “we hope “ “ we assume “ HILLARY LEUNG APRIL 3, 2020 Troubling headlines have been…
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How can one predict whether an individual infected with the SARS-CoV-2 virus will be asymptomatic?

According to https://english.alarabiya.net/en/features/2020/03/25/Coronavirus-Iceland-s-mass-testing-finds-half-of-carriers-show-no-symptoms, half of the SARS-CoV-2 virus virus carriers show no symptoms. What are the biological factors that…
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Why don't we take a random sample of the population to estimate the amount of COVID-19 cases?

Current statistics on number of cases will always be a few days behind reality due to the time between infection and going to get tested, asymptomatic people, etc. But why not take a random sample of a few thousand people people, and test all of…
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Is there an estimate of how many people infected with SARS-CoV-2 are asymptomatic?

A week ago spanish soccer team returned from Milan and 1/3 of the team members have been tested positive for Coronavirus, but none of them developed symptoms. They yet could develop since the incubation period is said to be up to 2 weeks, but it's…
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What's the incubation period for COVID-19

My parents are both infected with the delta variant of COVID-19 and I have searched for the incubation period for that particular string. But I couldn't find any answer. Delta variant is highly contagious and it takes less time to show symptoms but…
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What are the risk factors currently thought important for disease severity in COVID-19?

I have heard of from reading numerous journal articles, and newspaper/TV reports: age > 70 age < 5 obesity smoker cigarettes or pot male blood group not group O poor socio economic status crowded and multi-generational living black, hispanic…
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Are countries with lower life expectancy expected to have lower death rates due to Coronavirus?

Coronavirus death rates are higher for people in the range of 80+ (14,8%) and 70-79 years old (3,6%). However, there are countries, specially in Africa, where life expectancies are in the 50-60 and 60-70 years old range. Some people (like Bill…
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