Pfizer launches Covid-19 vaccine delivery trial in four US states

Pfizer has launched a pilot delivery program for its experimental Covid-19 vaccine in four US states, as the drugmaker seeks to address distribution challenges posed by its ultra-cold storage requirements. The US drugmaker said it had selected Rhode Island, Texas, New Mexico, and Tennessee for the program because of their differences in overall size, diversity of populations and immunisation infrastructure, as well as the states’ need to reach individuals in varied urban and rural settings.