California officials say they expect to receive more than 600,000 doses of the Moderna vaccine by the end of the year. AdvertisementAs with the Pfizer vaccine, millions of second doses of the Moderna vaccine are being held in reserve. The Moderna shot, like the Pfizer one, was slightly more effective in men than in women. There were also hints that the Moderna vaccine might prevent people with mild or asymptomatic infections from spreading the virus to others. AdvertisementThe FDA didn’t find any significant safety issues with the Moderna vaccine, aside from common side effects such as fatigue and muscle aches.

Source: Los Angeles Times December 19, 2020 00:45 UTC