U.S. States Relaunch J&J Shot After 10-Day Halt: Virus Update Bloomberg 1 hr ago (Bloomberg) -- U.S. states from New York to Arizona moved to begin administering the one-shot Johnson & Johnson vaccine again, restoring one of the nation’s options even as inoculation rates slow. Illinois, Maryland and Tennessee were among other states to resume giving the shots, a day after U.S. health agencies lifted the pause on the vaccine while they reviewed serious and rare cases of blood clots. The first billion Covid-19 vaccine doses have been administered around the world. The U.K. has given half of its population a first dose of vaccine, a key milestone to reviving an economy among the worst-hit in the early months of the pandemic.