Scientists Debate New Covid-19 Vaccination Tactics as Rollout Falters – The New York Times

“We have an issue with distribution, not the number of doses,” said Saad Omer, a vaccine expert at Yale University. “Doubling the number of doses doesn’t double your capacity to give doses.”

Federal health officials said last week that some 14 million doses of the Pfizer-BioNTech and Moderna vaccines had been shipped out across the country. But as of Saturday morning, just 4.2 million people in the United States had gotten their first shots.

That number is most likely an underestimate because of lags in reporting. Still, the figure falls far short of the goal that federal health officials set as recently as last month to give 20 million people their first shots by the end of 2020.

Many of these rollout woes are caused by logistical issues — against the backdrop of a strained health care system and skepticism around vaccines. Freeing up more doses for first injections won’t solve problems like those, some researchers argue.

Shweta Bansal, a mathematical biologist at Georgetown University, and others also raised concerns about the social and psychological impacts of delaying second doses.