59 votes
Accepted

Are the social-distancing measures implemented against SARS-CoV-2 also suppressing the spread of other viruses?

Yes, this helps as well with other infectious diseases. A good example is the flu, which season was measurably shorter this year than in other years on record. See the figure from the reference 1 for ...
Chris's user avatar
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49 votes

Why do some viruses cease being a problem even though no vaccine or cure is found?

Infections spread in a population when the number of new infections caused by an infected person is greater than or equal to 1. If each infected person spreads the virus to less than 1 person, ...
Bryan Krause's user avatar
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41 votes

Are the social-distancing measures implemented against SARS-CoV-2 also suppressing the spread of other viruses?

In addition to Chris' answer above, the effect is even more pronounced in Southern Hemisphere countries where flu season started during the pandemic. The New Zealand lockdown and health response ...
Aethernaught's user avatar
37 votes

Why don't viruses reach broad concentration outdoors in a city like allergens?

2, 4, 5, and 6. 6 being that the UV light (from the sun), fluctuations in temperature, humidity, wind etc mean that the virions are decayed relatively rapidly for most virus species. To address (1): ...
bob1's user avatar
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36 votes

Is there a vaccine against the plague (Yersinia pestis)?

There is little motivation right now for vaccination against plague because: Human infections with plague are fairly rare. A vaccine administered to the general populace would have to be very cheap ...
Bryan Krause's user avatar
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35 votes
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Are all emerging viral diseases of the past 100 years zoonoses?

To my knowledge, yes. A partial list of recently emerged/emerging viral diseases (I certainly could have missed some), with probable reservoir hosts: Chikungunya* (birds, rodents) coronaviruses/...
Ben Bolker's user avatar
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32 votes
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Why is China experiencing such a surge in acute cases of COVID?

There are a number of different reasons, all adding up to the current situation. The strain: There is not a special strain going on in China, according to different references it is mostly the ...
Chris's user avatar
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24 votes

Are all emerging viral diseases of the past 100 years zoonoses?

Hepatitis D emerged in the past 100 years, without being a zoonosis Hepatitis D is a virus which is able to replicate only in the presence of a hepatitis B co-infection. It causes the same symptoms ...
DrSheldon's user avatar
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22 votes

Why don't viruses reach broad concentration outdoors in a city like allergens?

In another answer elsewhere on StackExchange, a poster estimated that there might be something like 100 g to 1 kg of SARS-CoV-2 virus worldwide, and that's an estimate of all the virus, including what ...
Bryan Krause's user avatar
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18 votes
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Is COVID-19 claimed to get less deadly over time? If so, why?

While the data are much too sparse and noisy to give an answer about what is happening to COVID-19's virulence (the technical term for the "deadliness" of an infectious disease), or to forecast what ...
Ben Bolker's user avatar
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17 votes

Why do some viruses cease being a problem even though no vaccine or cure is found?

Bryan Krause's answer addresses the reasons pertinent to SARS and MERS. If you meant those two as examples but are interested in the title question more generally, I can note an additional mechanism. ...
nanoman's user avatar
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16 votes

Is there a vaccine against the plague (Yersinia pestis)?

There is already plague vaccine in use, which is only administered to lab workers working on Y. Pestis or people residing in areas affected with plague. (Via: https://www.cdc.gov/mmwr/preview/...
Twinkle Sheen's user avatar
15 votes
Accepted

How exactly does alcohol solution kill or neutralize viruses?

Alcohols dissolve lipid bilayers Many viruses have an outer lipid bilayer. Ethanol lyses cells, and in the same fashion damages membrane-bound viruses by rupturing the bilayer (which is made of ...
S Pr's user avatar
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13 votes
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Why WHO has not eliminated chicken pox like smallpox?

Eliminating a virus from the world is an immensely costly undertaking. As with most things in real life, cost vs. benefit (and feasibility) need to be taken into account. Unfortunately, there is a ...
anongoodnurse's user avatar
13 votes
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Why are bats the source of dangerous coronavirus pandemics?

The preponderance of links between bat and human pathogens has led to a debate about whether bats disproportionately contribute to emerging viral infections crossing the species barrier into humans (...
iayork's user avatar
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11 votes

Why are men more susceptible to severe COVID-19?

Update -- In the time since this question was asked, two relevant articles have been published, one in Nature Reviews Immunology and one in medRxiv (note: medRxiv is a preprint server and is therefore ...
acvill's user avatar
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11 votes
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Can the Monkeypox virus be spread by mosquitoes?

As yet there are unlikely to have been any studies looking at this particular scenario with Monkeypox virus, as it hasn't been widely studied. However, the poxviridae are all similar in that they are ...
bob1's user avatar
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9 votes
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Role of Prevalence in Estimating Coronavirus Mortality

I think you're talking (setting aside false-positive/low-specificity testing problems for the moment) about the difference between infection fatality ratio (IFR, fraction of infected people who die ...
Ben Bolker's user avatar
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9 votes
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Is COVID-19 more deadly than swine flu?

“Swine flu” is an obsolete name. The official name for the virus that was briefly called “swine flu” is “H1N1pdm09”. H1N1pdm09 has a mortality rate of around 0.01-0.1%. That’s roughly 10- to 20-...
iayork's user avatar
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8 votes

Why it is important to vaccinate a human newborn within 24 hours since birth?

In the US, infants are vaccinated against Hep B at birth and again a month or two later as well, because of the risk of maternal transmission. If the mother is known to be HepB positive, HBIG will ...
anongoodnurse's user avatar
8 votes
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how the coronavirus was distinguished?

This is basic epidemiology. When medical professionals notice that a group of people with some characteristic in common, are being seen for a similar disease, they ask if there's a connection. In this ...
iayork's user avatar
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8 votes

If the covid-19 appeared once, could it reappear anytime?

Frame challenge answer: you are jumping to the conclusion that they really hope the virus will "die out". But it's more likely they adopted those measures to slow its progression to a manageable ...
Dolphin 613 Motorboat's user avatar
8 votes

Why do some viruses cease being a problem even though no vaccine or cure is found?

And considering the title more broadly, We learn to live with them, manage the infections, and consider a significant death toll or other related injuries as "normal". For example, a measles ...
Graham's user avatar
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7 votes
Accepted

Why it is important to vaccinate a human newborn within 24 hours since birth?

Since another posted answer addresses HepB vaccination at least as effectively as I would have, I'll say something about first-day scheduling for BCG, which is consistent with WHO guidelines (emphasis ...
Ben Bolker's user avatar
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7 votes

How do we know that mild forms of rabies are nonexistent?

There are many people worldwide who are exposed to rabies and don't die (they get treatment), but there are very few of these cases where people don't die after rabies has entered the central nervous ...
De Novo's user avatar
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7 votes
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If rabies always kills its hosts, must there be some animal that is an asymptomatic carrier?

This is an interesting question, and it's been subject to a fair amount of research. From an epidemiological perspective, most rabies outbreaks have been studied in dogs. Among domestic dogs, the R0, ...
416E64726577's user avatar
6 votes
Accepted

Why don't phagocytes eliminate mutualistic foregin organisms residing in our body?

Molecular context is important here. E.coli in your colon is OK with the body, it is taken up by phagocytes as part of normal "surveillance". Your immune system will learn and gain "tolerence" to ...
Artem's user avatar
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6 votes
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Where can I find disease diagnosis datasets?

CDC Wonder, a health database of the US Center of Disease Control and Prevention (CDC), has weekly data for Nationally Notifiable Infectious Diseases and Conditions, United States: Weekly Tables from ...
Jan's user avatar
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6 votes
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Why is there no herd immunity against common cold coronaviruses?

The following review has extensive answers to the complex of this question. They also include MERS and SARS-Cov-1 in their discussion, as there is good data on them. Huang et al., A systematic review ...
R Stephan's user avatar
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6 votes
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Why there aren't any pandemic diseases by prions?

I think that you could argue that some prion diseases do form epidemics or outbreaks. In some cases it does appear that people have referred to BSE/vCJD as pandemics. There is even some journalism on ...
Maximilian Press's user avatar

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