The United States is reviewing the need for a third Covid-19 booster shot among residents who have already been vaccinated but needs to see more data to know if additional shots could raise people's risk of serious side effects, a U.S. health official said Tuesday.
The official said the second dose for two-shot Covid-19 vaccine regimens was associated with higher rates of side effects, suggesting a third dose could potentially come with even greater risks.
"We're keenly interested in knowing whether or not a third dose may be associated with any higher risk of adverse reactions, particularly some of those more severe - although very rare - side effects," said Jay Butler, deputy director at the US Centers for Disease Control and Prevention, during a media briefing.
The US government has not made a decision on whether to administer booster shots but sees a greater potential need for them among the elderly and other groups at high risk for severe infection, Butler said.
- Reuters -
The official said the second dose for two-shot Covid-19 vaccine regimens was associated with higher rates of side effects, suggesting a third dose could potentially come with even greater risks.
"We're keenly interested in knowing whether or not a third dose may be associated with any higher risk of adverse reactions, particularly some of those more severe - although very rare - side effects," said Jay Butler, deputy director at the US Centers for Disease Control and Prevention, during a media briefing.
The US government has not made a decision on whether to administer booster shots but sees a greater potential need for them among the elderly and other groups at high risk for severe infection, Butler said.
- Reuters -
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