Dr. Mallika Marshall is answering your coronavirus vaccine-related medical questions.

AstraZeneca said that late-stage trials show its COVID-19 vaccine is up to 90-percent effective. Dr. Mallika Marshall reports.

Dr. Mallika Marshall reports.

The study looked at more than 1,000 healthy adults and found the vaccine induced strong antibody and immune responses. WBZ-TV’s Dr. Mallika Marshall reports.

WBZ-TV’s Dr. Mallika Marshall is answering your coronavirus questions.

As the number of coronavirus cases continues to grow, WBZ-TV’s Dr. Mallika Marshall is receiving a number of questions from the public.