RIO DE JANEIRO, BRAZIL - Scientists in the final trials on the real effects of the Coronavac vaccine in the Chilean population report that it is effective, but recommend a third dose approximately six months after initial immunization.
"Our results show that six months after vaccination, neutralizing antibodies and specific T-lymphocytes are still detected in the blood of vaccinated individuals, but levels are lower compared to what is observed four weeks after the second . . .
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