I am going to try to get out ahead of this and hopefully you can all help spread accurate information. Supposedly a legitimate case of “reinfection” with CV-19 has occurred in Hong Kong. (HK Article) The person had a mild infection several weeks ago and a new “infection” was detected on re-entry to the country after traveling, but the person was completely asymptomatic. The genetic sequence was different, so a true reinfection was likely. Now the purveyors of panic are already seizing on this as proof that there is no lasting immunity and we are all doomed. (We are all doomed, but not because of coronavirus, but because that is the nature of life and death, and, well, because of the apparent incredible irrationality of a large portion of humanity.)
Okay, it took me a while to realize I needed to explain this better, which I did a couple of weeks ago, but will repeat here. Adaptive immunity is what develops after an acute infection with a pathogen the body hasn’t encountered before. It is comprised largely of memory B cells, and their associated antibodies, and memory T cells, which can be present in blood and mucosal tissues. Adaptive immunity doesn’t encase us in a plastic bubble that keeps a pathogen from ever entering the body. What it does is provide a rapid response when the pathogen, or a related pathogen, is recognized as having re-entered the body, and that rapid response almost always will clear the pathogen very quickly, without you ever even noticing anything. Happens all the time, every day. While this process is occurring, you are almost certainly not infectious.
So, let’s take the example of a seasonal coronavirus. You wander around and encounter them every day. Because you have been infected with them before, your body has memory B cells and T cells that keep the virus from getting any foothold and beginning to replicate. But if you were getting tested every day for seasonal coronavirus, at some point a test might be positive because there was virus in your nasal or throat passages. This would just randomly occur at some point. Means nothing, because you are not infectious, you just got detected in the process of having virus in your upper respiratory tract before it got cleared by the adaptive immune response. So this poor guy was traveling, picked up some virus, had no idea he did, and got tested before it was cleared.
This is back to my ruminations on what it means to be “infected”. I think what is important is are you “infectious”. Once you have developed adaptive immunity, it is highly, highly, highly unlikely that you are going to be infectious again, even though you may encounter the pathogen and even breath it in.
The Healthy Skeptic is a website about the health care system, and is written by Kevin Roche, who has many years of experience working in the health industry. Mr. Roche is available to assist health care companies through consulting arrangements through Roche Consulting, LLC and may be reached at 
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Sounds like what we called a “relapse” with mumps. Meant we didn’t rest long enough.
In early July I bet my wife that the panic mongers would feature this as their main talking point by the beginning of September – just as the school year was to get underway. Looks like I’m going to win.
The C-19 alarmists are so predictable!
Do you get the impression that the news media scans everything that happens and deliberately cherry picks stuff they think they can use to maximize our fear? I bet they have a computer which calculates fear factors for each particular scenario.
‘In early July I bet my wife that the panic mongers would feature this as their main talking point by the beginning of September’
I bet on a second wave. That’s always scary and who knows when it might happen. We just might have to stay locked down forever.
In all seriousness, with millions of tests and cases, if it’s taken them this long to confirm a single case of reinfection, that suggests it is very rare. Which is a good thing.
I read Paul Mirengoff’s take on this at Powerline yesterday and all I could think was, “So what?” That’s been a fairly common response in my head to most of the news this year. It’s long past clear this isn’t Ebola.
If we tested for the specific virus every time someone showed up at an urgent care with a cold, what sort of terrors might the media be able to conjure up with the findings? Hell, why not test everyone every day to see what we happened to breathe in during the day regardless of whether we feel sick? What else is going on under our noses (literally) that we can turn into an international nightmare?