How to get drugs into the respiratory tract.

Haemophilus influenzae type b about vaccine efficacy and immunity can be answered quickly providing there is continued enthusiastic cooperation from paediatricians in BPSU studies such as the study of invasive H influenzae type b infection in vaccinated children.* These questions relating to H influenzae type b vaccine serve to exemplify a more general issue. They highlight the importance of adequate audit of changes to public health policy (such as immunisation practices), rigorous attention to which might lessen or circumvent unnecessary controversy such as the recent precipitous withdrawal of two measles, mumps and rubella vaccines from routine supply which occurred in the UK.