SYDNEY, April 30 (Xinhua) -- Receiving a vaccine booster in the same arm as the first dose triggers a faster and stronger immune response and helps the body build protection faster, a new research ...

A pharmacist holds a vial of the Moderna COVID-19 vaccine. Source: AAP 澳大利亚药监局（The Therapeutic Goods Administration，TGA）批准莫德纳（Moderna）疫苗用于COVID-19加强针。