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The coronavirus may be “reactivating” in people who have been cured of the illness, according to Korea’s Centers for Disease Control and Prevention.

About 51 patients classed as having been cured in South Korea have tested positive again, the CDC said in a briefing on Monday. Rather than being infected again, the virus may have been reactivated in these people, given they tested positive again shortly after being released from quarantine, said Jeong Eun-kyeong, director-general of the Korean CDC.

EH15 wrote:

The coronavirus may be “reactivating” in people who have been cured of the illness, according to Korea’s Centers for Disease Control and Prevention.

About 51 patients classed as having been cured in South Korea have tested positive again, the CDC said in a briefing on Monday. Rather than being infected again, the virus may have been reactivated in these people, given they tested positive again shortly after being released from quarantine, said Jeong Eun-kyeong, director-general of the Korean CDC.

https://www.bloomberg.com/news/articles/2020-04-09/coronavirus-may-reactivate-in-cured-patients-korean-cdc-says

False negatives?

EH15 wrote:

The coronavirus may be “reactivating” in people who have been cured of the illness, according to Korea’s Centers for Disease Control and Prevention.

About 51 patients classed as having been cured in South Korea have tested positive again, the CDC said in a briefing on Monday. Rather than being infected again, the virus may have been reactivated in these people, given they tested positive again shortly after being released from quarantine, said Jeong Eun-kyeong, director-general of the Korean CDC.

https://www.bloomberg.com/news/articles/2020-04-09/coronavirus-may-reactivate-in-cured-patients-korean-cdc-says

False negatives?

nymets1 wrote:Why has the coronavirus thread got locked on here and the Orlando Magic board but it never gets locked in the current affairs board?

I was thinking about this earlier. In a US state where there's hotspots in a certain city/county, try to keep everybody out of those hotspots. The more people that keep traveling into those hotspots, than the number of cases keeps going up. I think the quickest way to get over the virus and not have to think about a 2nd or 3rd wave is the more people that can catch the virus the better because there's lesser people to infect once the people catch the virus than recovered and are now immune. No way the 2nd wave will be anywhere as worse as the 1st wave. A lot more people hopefully everyone will be a lot more prepared for the 2nd wave. Everybody will be better in the 2nd wave of staying home and social distancing so the virus can't infect as many people as the 1st wave. I'm estimating between 25 to 50 million people that are USA residents that are unconfirmed cases either have the virus now or have already recovered and I'm thinking at the end of the 1st wave as many as 50 to 100 million USA that are unconfirmed cases have caught the virus and recovered. My guess is in the 2nd wave no more than 1 million USA residents catch the virus.

1. Immunity isn’t a sure thing
We have not yet established that those who recover from this infection indeed develop long-term immunity. Herd immunity projections depend completely on such a sustained immune response, and we haven’t found out whether that even exists. We all sincerely hope it does, but we won’t know for certain until we study recovered patients over time.

ellobo wrote:

nymets1 wrote:Why has the coronavirus thread got locked on here and the Orlando Magic board but it never gets locked in the current affairs board?

I was thinking about this earlier. In a US state where there's hotspots in a certain city/county, try to keep everybody out of those hotspots. The more people that keep traveling into those hotspots, than the number of cases keeps going up. I think the quickest way to get over the virus and not have to think about a 2nd or 3rd wave is the more people that can catch the virus the better because there's lesser people to infect once the people catch the virus than recovered and are now immune. No way the 2nd wave will be anywhere as worse as the 1st wave. A lot more people hopefully everyone will be a lot more prepared for the 2nd wave. Everybody will be better in the 2nd wave of staying home and social distancing so the virus can't infect as many people as the 1st wave. I'm estimating between 25 to 50 million people that are USA residents that are unconfirmed cases either have the virus now or have already recovered and I'm thinking at the end of the 1st wave as many as 50 to 100 million USA that are unconfirmed cases have caught the virus and recovered. My guess is in the 2nd wave no more than 1 million USA residents catch the virus.

"Please, Don't Intentionally Infect Yourself With Coronavirus -- Signed, an Epidemiologist"
https://www.nytimes.com/2020/04/08/opinion/coronavirus-parties-herd-immunity.html

Reason 1:

1. Immunity isn’t a sure thing
We have not yet established that those who recover from this infection indeed develop long-term immunity. Herd immunity projections depend completely on such a sustained immune response, and we haven’t found out whether that even exists. We all sincerely hope it does, but we won’t know for certain until we study recovered patients over time.

There are six more reasons in the article.

Basically, getting infected puts you at risk of death and other serious, known and possible, short and long-term, negative effects, without necessarily giving you immunity to reinfection. Plus, it makes you a carrier that can put others at risk.

SSUBluesman wrote:

ellobo wrote:

nymets1 wrote:Why has the coronavirus thread got locked on here and the Orlando Magic board but it never gets locked in the current affairs board?

I was thinking about this earlier. In a US state where there's hotspots in a certain city/county, try to keep everybody out of those hotspots. The more people that keep traveling into those hotspots, than the number of cases keeps going up. I think the quickest way to get over the virus and not have to think about a 2nd or 3rd wave is the more people that can catch the virus the better because there's lesser people to infect once the people catch the virus than recovered and are now immune. No way the 2nd wave will be anywhere as worse as the 1st wave. A lot more people hopefully everyone will be a lot more prepared for the 2nd wave. Everybody will be better in the 2nd wave of staying home and social distancing so the virus can't infect as many people as the 1st wave. I'm estimating between 25 to 50 million people that are USA residents that are unconfirmed cases either have the virus now or have already recovered and I'm thinking at the end of the 1st wave as many as 50 to 100 million USA that are unconfirmed cases have caught the virus and recovered. My guess is in the 2nd wave no more than 1 million USA residents catch the virus.

"Please, Don't Intentionally Infect Yourself With Coronavirus -- Signed, an Epidemiologist"
https://www.nytimes.com/2020/04/08/opinion/coronavirus-parties-herd-immunity.html

Reason 1:

1. Immunity isn’t a sure thing
We have not yet established that those who recover from this infection indeed develop long-term immunity. Herd immunity projections depend completely on such a sustained immune response, and we haven’t found out whether that even exists. We all sincerely hope it does, but we won’t know for certain until we study recovered patients over time.

There are six more reasons in the article.

Basically, getting infected puts you at risk of death and other serious, known and possible, short and long-term, negative effects, without necessarily giving you immunity to reinfection. Plus, it makes you a carrier that can put others at risk.

I haven't read the article but this touches on something I had been thinking about, namely whether there are genetic/environmental factors that make it significantly riskier for an individual to contract. For example there's multiple countries where men are contracting/dying at a higher rate than women, I've seen research that points to significant infection rate differences based on blood type, there's the possibility of antibodies that we've seen reported out of Italy, etc.

Mind_Odyssey wrote:

Read on Twitter

Read on Twitter

gavran wrote:

Mind_Odyssey wrote:

Read on Twitter

Read on Twitter

What about the rest of Denmark?

I tested 4 versions of the Shop Towel Mask today; mask 1) exactly according to the video, mask 2) long rubber bands on each side that could be tied behind the neck, mask 3) shoe strings instead of rubber bands so you could tie high and low like a surgeon’s mask, and mask 4) stacking two sheets together (double ply) with the long rubber bands around the neck. All of the masks were worn by the same individual (67yo healthy Caucasian male) and mask effectiveness was measured while, bending at the waist for 50sec, reading aloud for 30 sec, looking left and right for 30 seconds, and looking up and down for 30 seconds. Here’s what we found (I’ll refer to masks as 1-4 as described above):

Mask 1) 54.32% +/- 5.97% effective
Mask 2) 53.88% +/- 7.67% effective
Mask 3) 41.91% +/- 8.46% effective
Mask 4) 73.97% +/- 6.59% effective

So, mask 4 (2 pieces of paper towel together) performed the best. And while 73.97% may not seem very effective, mask 4 was actually better than standard surgical masks with ear loops (38.93% effective), a homemade cotton mask (53.17% effective), and surgical masks with tie strings (71.50% effective). So here is the big thing to remember with all masks, fit is everything! Even an N95 without a good seal is ineffective. The other thing to remember is that trying to breath through a thick mask can be tough on your heart and lungs. This could put elderly people and those with preexisting cardiopulmonary conditions at risk. Don’t wear a mask that makes you feel like you’re suffocating and avoid wearing any mask for really long periods of time. Take care of yourself and stay safe. Trust science and we’ll get through this mess. Not really a plug but I will post relevant COVID info and inhalation tox info on Twitter @UNCtoxicology
Thanks!
Phillip Clapp, PhD

Joe Fan King-man, the institution’s assistant hospital chief executive, said the home-made masks had undergone laboratory tests by City University and were proven to have achieved 80 to 90 per cent of the function of regular surgical masks in terms of their filtration of aerosol and droplets.