Thanks to vaccination, the incidence of many diseases in the community has decreased significantly from 1984 to 2014: Whooping cough incidence decreased 900 times, diphtheria by nearly 600 times, measles by 550 times, and tetanus by 60 times. More than 6.7 million children were vaccinated against diseases, reducing 2/3 of deaths in children under 5 years old from 1990 to 2015.