After recovering from COVID-19, are you immune?

May 11, 2020
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After recovering from Covid-19 are you immune? Your article fails to mention the fact that there are TWO strains of the coronavirus circulating among humans. The original strain and a mutation of that virus which have both been identified by scientists. How can a person be immune to the original virus if they were sick with the mutated virus; and vise versa? So it's possible that person CAN be infected again with a different strain of this pandemic coronavirus. Which means no one is safe from infection, and all health precautions should be continued.
 
May 14, 2020
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Could you provide the source that says there are two different strains of the virus? I am doing research on the virus and would like to investigate that area.
 
May 16, 2020
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This very small number unpublished study from China's Elite Qinghua university found T-cell immunity faded and became quiescent very quickly after SARS-CoV-2 infection. Another study in recent weeks found the virus could neutralise and kill T-cells. Accordingly, the fact that SARS or MERS survivors had enduring T-cell immunity is irrelevant and no guide to the reality of COVID-19. It might be concluded that this is not the same disease at all but much more aggressively immuno-tropic.
 
Jul 1, 2020
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Sailors from the carrier USS Eisenhower who had recovered from COVID-19 are testing positive AGAIN and being isolated.

But Benjamin tenOever, a professor of biology at the Mount Sinai Icahn School of Medicine says this does not indicate re-infection. (It is in the article). There is no need to scare ourselves unnecessarily.
 

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