Covid vac­cine roundup: US vac­cine sup­plies grow, but ex­perts warn of po­ten­tial hic­cups in sup­ply chain; Emer­gent touts grow­ing Covid vac­cine ca­pac­i­ty

The Biden ad­min­is­tra­tion has been rais­ing hopes in the US that there will be am­ple vac­cine sup­plies to in­oc­u­late more than 250 mil­lion Amer­i­can adults by May. There have been new deals with Mod­er­na and Pfiz­er to ramp up 400 mil­lion dos­es, to cov­er 200 mil­lion, with 100 mil­lion sin­gle-shot vac­cines from J&J top fin­ish the job.

But some ex­perts are sound­ing a warn­ing that there could be a lot more to this than sim­ply sign­ing con­tracts. Vac­cine man­u­fac­tur­ing is not an easy busi­ness.

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