RIO DE JANEIRO, BRAZIL - Combining AstraZeneca's Covid-19 vaccine with a second dose of either Pfizer-BioNTech or Moderna's immunizer provides "good protection," the Danish State Serum Institute (SSI) said Monday, August 2.
A growing number of countries are considering switching to different Covid-19 vaccines to administer second doses, a measure particularly necessary in Denmark since health authorities suspended inoculations with AstraZeneca's vaccine in April over concerns of rare adverse reactions.
Over 144,000 Danes, mostly frontline health care professionals and the elderly, were given a first dose of AstraZeneca's immunizer, but were subsequently vaccinated . . .