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Experts said it would “make sense” to offer a Covid-booster injection to those with compromised immune systems after a study found that two out of five produced low or undetectable levels of antibodies after two doses.
One in nine of the “immunosuppressed” people had no antibodies at all in their bloodstream four weeks after receiving a second Covid hit, even though they produced healthy levels of T cells, suggesting the vaccine provides They have some protection.
The findings raise the possibility that people with weakened immune systems as a result of autoimmune diseases such as vasculitis or treatments for conditions such as cancer or kidney failure will be the first to receive a third or “booster” vaccine, with a program expected to begin.
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