#COVID19 Comprehensive summary of the leading COVID-19 vaccines from    Vaccines mentioned: - CanSino Ad5-nCov - $MRNA mRNA-1273 - $INO INO-4800 - Oxford ChAdOx1-nCov19 - Sinovac PiCoVacc - $BNTX $PFE $JNJ $SNY $GSK and Wuhan candidates