"There are certain mutations in the delta variant that, for example, allow the virus to adhere to a cell more easily. Some laboratory studies suggest that there is increased replication in some of the modeled human airway systems," the official added.
According to the experts, at least 70 percent of vaccine coverage globally is needed to slow down the transmission and reduce the risk of new variants.
#FromTheSouth News Bits | The Cuban vaccines Soberana 02 and its supplement Soberana Plus have shown an efficacy of 91.2% in the prevention of symptomatic COVID-19, scientists from the island reported. pic.twitter.com/bDGy1xhPg0