Most adults remain confident in the safety of long-standing childhood vaccines, though people’s views of the COVID-19 vaccine are heavily polarized, according to a new poll from health research organization KFF.   More than 80 percent of American respondents said they’re “very” or “somewhat” confident that the polio vaccine and the measles, mumps and rubella…

Most adults remain confident in the safety of long-standing childhood vaccines, though people’s views of the COVID-19 vaccine are heavily polarized, according to a new poll from health research organization KFF.   More than 80 percent of American respondents said they’re “very” or “somewhat” confident that the polio vaccine and the measles, mumps and rubella…