Tuesday Pfizer announced it's expanding its clinical trials for younger children ages 5 to 11-years-old. Medical doctors are calling this the final frontier. This is a 2-year study, where a subset of ...

Vaccine maker Pfizer said Friday that trials of its vaccine in children ages 2 to 5 show that it did not provide the expected immunity in kids this age, and it is adding a third dose to the regimen.

Pharma groups like $113 bln Sanofi and Pfizer have spent years investing in immunisations. But scepticism from the US ...