The world’s largest syringe maker does not have the capacity to substantially increase U.S. supplies of specialty syringes needed to squeeze more doses from Pfizer Inc. Covid-19 vaccine vials in the coming weeks, an executive said in an interview.
U.S. public health officials said a second Covid-19 shot could be administered as much as six weeks apart from the first one in situations where it was not possible to get a booster dose immediately.
