A measles vaccination campaign in Manila this year. That vaccine is believed to confer an additional benefit beyond immunity to the virus. Vaccinations against other diseases — polio, tuberculosis, typhoid — may also confer an unintended protect
A measles vaccination campaign in Manila this year. That vaccine is believed to confer an additional benefit beyond immunity to the virus. Vaccinations against other diseases — polio, tuberculosis, typhoid — may also confer an unintended protect