SARS-CoV-2 reinfections with BA.1 (Omicron) variant among fully vaccinated individuals in northeastern Brazil.
Francisco P Freire-NetoDiego Gomes TeixeiraDayse C S da CunhaIngryd C MoraisCelisa P M TavaresGenilson P GurgelSanderson D N MedeirosDavid C Dos SantosAlexandre de O SalesSelma Maria Bezerra JeronimoPublished in: PLoS neglected tropical diseases (2022)
Our findings suggest that the Omicron variant is able to evade both natural and vaccine-induced immunity, since all nine cases had prior natural infection and, in addition, were fully vaccinated, emphasizing the need to develop effective blocking vaccines.