Sweden will give different second vaccine dose to people under 65 who had first dose of AstraZeneca

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(CNN) — People under the age of 65 in Sweden who have received a first dose of the AstraZeneca vaccine will be given a different vaccine for their second dose, with a so-called mRNA vaccine such as Pfizer/Biontech or Moderna, the Swedish Health Agency announced on Tuesday.

“In view of the very rare but serious side effect reported after vaccination with Vaxzevria [the AstraZeneca COVID-19 Vaccine], the Swedish Public Health Agency considers that the vaccine cannot be generally recommended for persons under 65 years of age,” a Swedish Health Agency spokesperson said in a phone call to CNN, following a statement issued by the agency

The Swedish Public Health Agency said both it, and the European Medicines Agency (EMA,) considered AstraZeneca to be effective in preventing Covid-19 disease and reducing serious illness and death, and will continue to use it to vaccinate people over the age of 65 years old.

Sweden paused the use of the AstraZeneca vaccine in March after reports of rare blood clots among people vaccinated with the shot.

A mix and match trial was expanded in the UK last week to examine whether different coronavirus vaccines can safely be used for two-dose regimens, with results expected by summer 2021.

This story was first published on CNN.com, "Sweden will give different second vaccine dose to people under 65 who had first dose of AstraZeneca."