Claire Hannan, head of the Association of Immunization Managers, says the officials planning vaccine distribution face plenty of challenges. One is not knowing how many doses are coming their way.

The FDA will likely make a decision about approving Pfizer's vaccine "shortly after" an advisory committee meeting on Thursday. The agency has found "no specific safety concerns" about the vaccine.

This week’s Medical Minute, discusses “Remote Ischemic Conditioning”, a relatively simple technique that scientist hope will become a useful treatment for Hemorrhagic strokes, the most deadly type of stroke.

Here's how to self-isolate, what the new quarantine guidance means for your household, and which symptoms signal you need immediate emergency care.

Researchers found that a class of antibodies in a monkey's blood provides protection from COVID-19. If that hold true for humans, a blood test may predict whether a vaccine candidate is working.

Experts say low-risk people in the U.S. will likely be immunized before many high-risk people in poor countries.

The Pfizer-BioNTech COVID-19 vaccine was developed fast. But a leading vaccine expert says its important for consumers to know the companies "haven't cut corners" in the clinical science.

The U.S. government says it will issue a vaccine card and use other tools to help millions of Americans follow through with their immunizations against COVID-19.

The biotech company has new data reinforcing that its COVID-19 inoculation is safe and effective. Moderna is submitting an application to the FDA requesting emergency use authorization.

The medicines from Eli Lilly and Regeneron are infused, a process that can take two hours or longer, including observation for side effects. Staffing is as big an issue as the supply of the drugs.

The $1.95 billion Operation Warp Speed contract excludes government rights to inventions or production know-how developed in the manufacture of the COVID-19 vaccine.

Operation Warp Speed is allocating the first batch of 6.4 million COVID vaccines to states, based on population. This circumvents a CDC advisory committee, which proposed allocation based on risk.

A newly approved drug can extend the lives of children with progeria, a rare disorder that causes rapid aging. The drug is the result of one family's effort to help a child with the fatal condition.

When Kansas issued a mask mandate, 81 counties opted out. Researchers found coronavirus infection rates rose sharply in the opt-out counties, while falling in those that required masks.

Watch an expert panel discussion on the effort to develop and deploy safe and effective vaccines against COVID-19 on Friday, Nov. 20, to be live-streamed here at 12 p.m. ET