Japan began implementing a mix-and-match COVID-19 vaccine strategy last month, with some health care workers who received the Pfizer-BioNTech jab for their first two shots getting Moderna Inc.¡¯s shot as a booster, as the government aims to accelerate the rollout of third shots amid heightened concerns over the omicron variant.
Like the European Union, the Japanese government is recommending people receive a different jab for their third doses to the one they received in the initial rollout, but what¡¯s the rationale behind that strategy? Here are some answers to address the most common questions about booster shots:
What do boosters offer in the way of added protection?
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