Unvaccinated children between 15 months and 5 years old should also get the vaccine.
Not exact matches
As most people would guess, such a study
between vaccinated versus
unvaccinated children would be unethical.
Instead, Witt's son found that whooping cough rates were not significantly different in vaccinated,
unvaccinated and undervaccinated
children between the ages of 8 and 12.