A only protects a population if enough people take it.
The medical part of the problem was solved decades ago.
The remaining part is about trust.
is rarely the result of a single false article.
It usually grows where an has already lost .
A clinic that has been rude once is not believed twice.
Campaigns that only repeat the science therefore have little effect.
What works better is a familiar person delivering the message.
Local nurses, teachers and religious leaders all national advertising.
Access matters as much as .
A parent who must lose a day of pay will whatever they believe.
Evening sessions and a clinic on the bus route change the numbers quickly.