Coronavirus US: Elderly excluded from 50% drug, all vaccine trials Daily MailCOVID-19: The Most Complicated Vaccine Campaign Ever The AtlanticVaccines 101: How new vaccines are developed nature videoPfizer urged to hold off on coronavirus vaccine until late November: report FiercePharmaAs Johnson & Johnson kick-starts phase 3 COVID-19 test, early data show up its promise FierceBiotechView Full Coverage on Google News