Sputnik Isn’t Making Enough Second Shots, Mexico Covid Czar Says

Mexico’s coronavirus czar said that production delays in Russia are leading to a shortage of the second shots of the Sputnik V vaccine.

The adenovirus used to deliver the second dose of the Sputnik vaccine doesn’t grow as quickly in a lab as the first, the deputy health minister, Hugo Lopez-Gatell, said at a press conference late Monday. That’s led Mexico to consider “Sputnik Light,” a proposal that would use the first dose as the primary vaccine, and the second as a booster as much as six months later, he said.