A new national poll shows that parents' views on vaccines became more favorable between 2014 and 2015, the same period that multiple outbreaks of measles and whooping cough unrolled around the country. One-third of participants said they perceive vaccines to be more beneficial than they did last year, while one-quarter said they view vaccines as safer than they did one year ago. An additional third said they are more supportive of daycare entry requirements than the year prior. More