The hidden infection isn’t just about Covid-19. Far from there. This form of infection has long been observed with other viruses. This is an example of the case of hepatitis B. “Occult infection by this virus is defined by the presence of this undetectable surface antigen in serum, despite circulating DNA from the virus”, explains the World Health Organization (WHO). ).
Cases of occult infection have also been observed with the Ebola virus. That’s when the presence of the virus in the long term undetected. Often he wakes up months later.
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Researchers from King’s College London and Guy’s and St Thomas’ NHS Foundation Trust found this situation for SARS-CoV-2 in immunosuppressed patients. Moreover, one of them tested negative for months after recovering from a previous Covid infection.
Then he again showed symptoms of the disease with a positive test. Nothing surprising because many cases of reinfection have been observed? This is true, but in this case, the second infection was caused by the Alpha variant, which has disappeared into the country by this time.
Therefore, the virus must remain in the body all the time, without manifesting itself. That allowed him to remain undetected, and thus conform to an occult infection.
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