The document cites recently obtained data showing that vaccinated individuals infected with the delta variant may be able to transmit the virus as easily as those who are unvaccinated.
For people eager to put the health crisis behind them, the relief of being vaccinated is being replaced by a new worry. Is immunity a ticking clock?
An unprecedented scientific, medical and industrial relay race is about to get underway. It depends on scientists, planes and some very cold freezers.
A coronavirus vaccine has become the light at the end of a very long tunnel, the tool that will bring the virus to heel.
Gilead Sciences executives were acutely aware in 2013 that their plan to charge an exorbitantly high price for a powerful new hepatitis C drug would spark public outrage, but they pursued the profit-driven strategy anyway, according to a Senate Finance Committee investigation.