US officials call for more data on vaccine boosters as Pfizer pushes for third shot

• Pharma company presses case with senior health officials

• WHO urges priority for nations with low Covid vaccination rates

Pfizer, the pharmaceutical company that created one of the first Covid-19 vaccines to be approved, has been making a hard sell for emergency approval of boosters – additional doses given to those already vaccinated, especially immunocompromised adults.

But in private meetings with Pfizer on Monday, senior US officials said they needed more data – prompting the latest debate over how to curb a pandemic which has claimed more than 620,000 lives in the country. Last week, the US health department also rebuked Pfizer for pressing for a booster shot, and Anthony Fauci, Joe Biden’s chief medical adviser, has said there isn’t enough evidence to support needing a third shot.

Related: Pfizer pushes for US booster shots as WHO says greed is driving vaccine disparities

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