Vaccination

China approves first mixed-vaccine trial as Delta spreads

China's drug regulator has approved the country's first mixed-vaccine trial, a company involved in the study said, as the rapid spread of the Delta variant raises concern about the efficacy of domestically produced jabs.

Vaccination

Moderna says Covid vaccine durable for at least six months

Moderna said Thursday that protection from its COVID-19 vaccine remained strong for at least six months, and the variant-specific boosters shot it is testing generated a "robust" antibody response to Delta.

Vaccination

Moderna expanding kids vaccine study to better assess safety

Moderna said Monday it plans to expand the size of its COVID-19 vaccine study in younger children to better detect rare side effects, such as a type of heart inflammation recently flagged by U.S. health authorities.

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