Mixing COVID-19 vaccine doses leads to more reactions, study finds
Mixing COVID-19 vaccine doses leads to more reactions, study finds, which may be 'first sign of success' Mixing different types of COVID-19 vaccines for two doses can hike the chance of someone having mild or moderate reactions like fatigue, headache, or a fever, according to early results from a U.K. study, which is being watched closely by health officials in Canada and beyond. Social Sharing