They switched focus because mRNA therapies are quite toxic and mult-dose therapies aren't well tolerated. vs vaccines which only need to be administered once or

They switched focus because mRNA therapies are quite toxic and mult-dose therapies aren't well tolerated. vs vaccines which only need to be administered once or twice. https://www.statnews.com/2017/01/10/moderna-trouble-mrna/ https://www.statnews.com/2017/01/10/moderna-trouble-mrna/