Within the next 24 to 48 hours, Americans should start receiving shots in arms," ---Johnson & Johnson's CEO

4 million J&J Covid vaccines ship out, Americans expected to receive shots within 2 days “Within the next 24 to 48 hours, Americans should start receiving shots in arms," Johnson & Johnson's CEO said Monday morning. NBC News

Johnson & Johnson's Covid-19 vaccine began shipping out Monday morning, and Americans should begin getting the single-dose shot within the next day or two, the company's CEO said.

The vaccine is "on trucks as we're talking," Johnson & Johnson CEO Alex Gorsky said Monday on NBC's "TODAY" show.

"We’re shipping 4 million literally as we speak," Gorsky said. “Within the next 24 to 48 hours, Americans should start receiving shots in arms.”

He added that 100 million shots should be distributed by June and a billion by the end of the year. And a billion doses means a billion vaccinated people since the Johnson & Johnson vaccine is given as a single dose. The other available vaccines, from Pfizer-BioNTech and Moderna, are given as two doses each, three to four weeks apart.

The J&J vaccine, which the Food and Drug Administration granted emergency use authorization on Saturday, is also the easiest to store, as it can be kept in a refrigerator rather than a freezer.

While the vaccine is 66 percent effective overall, the shot works 85 percent of the time against severe disease, and it 100 percent effective in preventing hospitalization and death.

Clinical trials were performed when cases were at their peak, and some were conducted in South Africa and Brazil, where a dangerous variant has spread.

Dr. Anthony Fauci said Sunday that the country now has three "highly efficacious vaccines" that provide significant protection from Covid-19. He urged Americans to take whichever one is available to them when they become eligible. ...