Doctors call Perry's vaccine order premature | Chron.com - Houston Chronicle

Among the statement's points is that mandating a vaccine for a disease not spread by casual or occupational contact — and currently only available to one gender — represents a departure from past practice. Such school immunization requirements came into existence, it says, to protect schoolchildren from outbreaks of contagious disease in that setting, not to compel vaccination. (The quickest a vaccine has gone from approval to mandatory in Texas was the chickenpox vaccine, which took 5 1/2 years.)