Nurse Cheryl Birmingham administers the Pfizer-BioNTech Covid-19 Vaccine to registered nurse La Tanya Forbes in Miramar, Florida, US, December 14, 2020. REUTERS
Nurse Cheryl Birmingham administers the Pfizer-BioNTech Covid-19 Vaccine to registered nurse La Tanya Forbes in Miramar, Florida, US, December 14, 2020. REUTERS

Vaccine distribution raises questions for wary Americans