How much measles (and drug resistant tuberculosis) came into the country because of Biden‘s immigration policies? We didn’t have a measles problem until Biden brought in all sorts of people from Third World countries.
MEASLES HERD IMMUNITY REQUIRES AT LEAST 95% OF THE POPULATION TO BE IMMUNE—THROUGH VACCINATION (TWO DOSES OF MMR) OR PRIOR INFECTION—TO STOP THE SPREAD OF THE VIRUS.