Americans can choose a Covid-19 booster shot that is different from their original inoculation but the recommendation is to stick with the vaccine they got first if it is available, White House chief medical adviser Dr Anthony Fauci has said.

“It's generally recommended that you get the booster that is the original regimen that you got in the first place,” Fauci, director of the National Institute of Allergy and Infectious Diseases, said in an interview with CNN.

The US Centers for Disease Control and Prevention had on Thursday recommended the Covid-19 vaccine boosters for recipients of the Moderna Inc and Johnson & Johnson shots, and said Americans can choose a different shot from their original inoculation as a booster.

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