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HKU Med Announces 1st Documented Reinfection With SARS-CoV-2

Michael Coston

Michael Coston

Editor, Senior Moderator
HKU Med Announces 1st Documented Reinfection With SARS-CoV-2




#15,432


With the caveat that one case does not confirm a trend, we appear to have the first confirmed reinfection with (apparently, two different strains) of SARS-CoV-2, from a tweet from the University of Hong Kong. The limited details, which are carried by news.rthk.hk can be read at the link below.

This case first came to light last week, when a 33 year-old Hong Kong man - who tested positive for SARS-CoV-2 last spring - tested positive again after recently returning from a trip to Spain. The CHP reported that man was an IT worker who first fell ill on March 23rd, tested positive on March 28th, and was discharged on April 15th following two negative tests.

At first, it was considered possible that this patient had simply never completely cleared the virus, and therefore tested positive. But today, we learn a genetic analysis shows his current infection is genetically distinct from his April infection.​

Details of this case will reportedly be published in the journal Clinical Infectious Diseases.

While this appears to prove that some individuals may be susceptible to reinfection with SARS-CoV-2 within a few months, we'll need to see substantially more documented cases before we can assume immunity wanes rapidly for the majority of the population.​


That is, however, a distinct possibility that we've discussed often over the past 6 months, including in:
 
2020-08-25 08:16:34Beijing News




Zhang Wenhong: "Re-infection" cases are "Fuyang" in an extraordinary sense



Beijing News Express recently, media reported that a Hong Kong COVID-19 patient who had recovered from a new crown pneumonia returned from a trip to Europe. He tested positive for nucleic acid again. The sequencing of the microbiology department of the University of Hong Kong confirmed that there was a difference from the previous infection. "Fuyang" in a non-general sense. On August 25, Zhang Wenhong, director of the Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, released a Weibo account to explain the matter.


Zhang Wenhong said that "re-infection" is about the durability of immunity, as well as the time for future vaccine protection and the interval between repeated vaccination. This time, the re-infection occurred four months later. This is still a case. This problem should be observed in a larger post-infection population. There are currently more than 22 million people in the world who have been infected. If the “re-infection” is established, then the new crown will be high.

And endemic areas, re-infection will become the norm. Let us wait and see, while waiting for further scientific reports from the University of Hong Kong. There is no need to be too nervous at the moment. After all, other common coronaviruses in history (such as the common cold that we often contract are caused by ordinary coronaviruses. There are currently 4 types, and 3 more powerful ones are SARS, MERS and COVID- 19) The immune time after infection is far more than 4 months.

http://www.bjnews.com.cn/news/2020/08/25/762002.html
 
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