The Indiana State Department of Health says it's confirmed 136 cases of whooping cough so far this year, more than double the number at this time last year.
The goal is to make immunizations more available to the public and drive down health care costs.
Pertussis has been around for more than 70 years and health officials say it's increasing in Indiana.
State health officials say Indiana is experiencing its largest outbreak of whooping cough, including two infant deaths, since 1959.
Reported cases of whooping cough are reaching the highest levels in nearly half a century.