Moderna asks Health Canada to authorize booster shot of its COVID-19 vaccine – CTV

October 6, 2021

OTTAWA — U.S. drugmaker Moderna is asking Health Canada to authorize a booster shot of its COVID-19 vaccine.

The company submitted data on a booster shot that is half the size of the doses used to give first and second shots of the vaccine so far.

Last month Moderna said there were signs immunity was waning the longer people got from their doses.

Public health and vaccine experts in Canada are leery of recommending booster shots for most Canadians because the vaccines thus far are showing to maintain strong protection against severe disease even if protection against infection at all is dropping.

The National Advisory Committee on Immunization said in late September a third dose of vaccine was warranted for people in long-term care homes or with compromised immune systems, similar to recommendations made by both the European Medicines Agency and the United States Food and Drug Administration.

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