Adults Antibodies Children Immune system PCR tests Severe Covid Symptoms Tests The Virus

It seems not all Covid-19 patients develop antibodies

Note eryone develops antibodies against SARS-Cov-2 when infected. It isn’t suprising since it is a common result when the same thing is investigated in other viral infections. Many factors are involved.

Adults BA.2.75 BA.4 BA.5 Children DNA Genetics Omicron PCR tests Tests The Virus Transmission Transmission and mitigation

New strains not showing up in PCR-tests

Later variants have mutated enough to not show up on single gene PCR-tests. For testing to function satisfactory PCR-tests now need two gene detection.