The presence of SARS-CoV-2 antibodies confers subsequent immunity in most people for at least six months, a study of healthcare workers in Oxford, UK, has found.
https://www.bmj.com/content/371/bmj.m4961
Please see the link below.
https://www.cidrap.umn.edu/news-perspective/2020/12/two-studies-find-covid-19-antibodies-last-8-months
Please see the link below.
https://www.cidrap.umn.edu/news-perspective/2020/12/two-studies-find-covid-19-antibodies-last-8-months
Article COVID-19: Significance of antibodies
Antibodies have protection between 4-8 months.
This immunity level depends on some important factors such as age, others diseases such as Diabetes, Obesity, Heart failure disease, Asthma, etc.
In the mentioned disturbances maybe immunity level decreased maximum 2-3 months after infection.
For all infectious diseases, the waning of antibody titers is normal and does not necessarily indicate the loss of protective long-term immunity.
Please have a look at the link below:
Article Antibodies, Immunity, and COVID-19
Please do have a look at the following useful link:
https://www.medscape.com/viewarticle/936574
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