The updated COVID-19 vaccine is now available. Infectious disease doctors recommend being smart about the timing of your shot ...

Vaccination is the most effective way to protect people from measles, CVS said. Patients ages 14 and older can receive the MMR vaccine and children ages 4 to 6 can receive the second vaccination.

That ambition is realistic partly because of CVS’s extraordinary reach. The company now fills some 2.5 billion prescriptions a year, giving it influence over drug prices. It insures more than one ...