Covid: Antibodies ‘fall rapidly after infection’


Levels of protective antibodies in people wane “quite rapidly” after coronavirus infection, say researchers. …The Imperial College London team found the number of people testing positive for antibodies has fallen by 26% between June and September. They say immunity appears to be fading and there is a risk of catching the virus multiple times.

— BBC News

The loss of antibodies with time is greater in seniors and in those with asymptomatic infections as compared with those with fullblown Covid-19. Exactly how this correlates with active immunity is unclear, as there are other components of the immune system besides antibodies. However, antibody levels in general appear to be predictive of who is protected. There are four other coronaviruses which cause disease in humans (causing common cold symptoms), each of which we can catch multiple times in our lives.

There have been very few documented cases of people getting Covid-19 disease twice, but that may be because immunity is just now beginning to fade since the peak infection rates in the spring. It is hoped, although not clear, if a second infection will be milder than the first because of residual “immune memory.”

If antibody levels and protective immunity fade after an infection, what are the implications for the induction of immunity after vaccination? Researchers say that the vaccine response may behave differently than the response to a natural infection. But it is possible, as for certain other immunizations, that even if the vaccine works people might need follow-up booster doses to restore fading immunity over time.

2 thoughts on “Covid: Antibodies ‘fall rapidly after infection’

  1. Strange how people that consider themselves way above average can turn off thought so easily becoming sheep.
    Is there any proof of existence needed before a test can detect something that is undefined -a solution to any problem requires a problem. There is a protocal that should be followed. Why would they not isolate and then electron microscope pics define the problem.?
    Lockdown ? Destroy all small business? Forced vaccines? Free or slave? Republic or what is a government called that supports the population in lockdown unable to earn and how does the model work out if permanent ? How can any eecenomy exist under lockdown
    Rna vaccine is not really a vaccine but is closer to editing your genes.
    Why did the normal flu disappear ? why should the hospital;recieve more money if normal flu or phnuemonia labelled covid?
    Why woul;d anyone listen to fauci without at least looking to see if he is a crook or a sellout.track record bleak –also sent his own lab to wuhan when supreme court outlawed level 4 labs for warfare blather
    I believe anytime normal protocal is not followed you should be careful and scrutinize everything.

    my thoughts are that your probably busy writing poetry or feeling special about fingerprints


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