Source: South China Morning PostJoe Biden said on Tuesday that his administration has now secured enough coronavirus vaccine for every adult in the US to be inoculated by the end of May, as he announced that Merck & Co Inc will help make rival Johnson & Johnson’s Covid-19 jab in a bid to boost production.The president said the US government had invoked the Defence Production Act to help equip two Merck plants to make the J&J single-dose vaccine.“One of the things that I learned when I came into office was that Johnson &…Read More