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Message: <blockquote data-quote="imhotep" data-source="post: 26951150" data-attributes="member: 562115">The antibodies of vaccinated people will last for some time whereas when you become infected you are not sure about the status unless you do an antibody test. But the people who got Covid initially and subsequently vaccinated are the best group in terms of immunity.With vaccinations of normal people, AZ possibly last about an year, with Pfizer its a bit less and that why you need another booster. Sputnik will fare a bit better than AZ. Previously I explained why, due to their Heterologous Boosting mechanism.Moderna fares a bit better. It has less breakthrough infections. ( A "Breakthrough" is when a vaccinated person gets infected)US reported most of the over 65 year olds did not have neutralizing antibodies after six months of vaccination. But their T-Cell immunity comes to the rescue.So it's recommended that they need another shot.</blockquote>

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