The U.S. Centers for Disease Control and Prevention (CDC) on May 13 advised that fully vaccinated people do not need to wear masks outdoors and can avoid wearing them indoors in most places, updated guidance the agency said will allow life to begin to return to normal. Reuters lays out some of recent scientific evidence on which the CDC and Director Rochelle Walensky based their updated guidelines, including vaccine efficacy against virus variants, increased availability and a reduction in cases.

The U.S. Centers for Disease Control and Prevention (CDC) on May 13 advised that fully vaccinated people do not need to wear masks outdoors and can avoid wearing them indoors in most places, updated guidance the agency said will allow life to begin to return to normal.

Pfizer’s Covid-19 vaccine generates antibody responses three-and-a-half times larger in older people when a second dose is delayed to 12 weeks after the first, a British study said.

Giving a first dose of Covid-19 vaccine but delaying a second dose among people younger than 65 could lead to fewer people dying of the disease, but only if certain conditions are met, a predictive modelling study showed.

U.S. states are set to begin using the vaccine from Pfizer Inc. and BioNTech SE to inoculate young adolescents against Covid-19 after advisers to the U.S. Centers for Disease Control and Prevention (CDC) backed the plan in a unanimous vote on May 12.

United Nations Secretary-General Antonio Guterres called on May 12 for the need to double the capacity of Covid-19 vaccine production and for fairer redistribution of the shots in the developing world, which faces new waves of the coronavirus.

Advisors to the U.S. Centers for Disease Control and Prevention (CDC) will meet on May 12 to discuss recommendations for the use of Pfizer and partner BioNTech’s Covid-19 vaccine in children aged 12 to 15.

The U.S. Food and Drug Administration authorized Pfizer and BioNTech’s Covid-19 vaccine for use in children as young as 12, widening the country’s inoculation program as vaccination rates slowed significantly. Reuters provided information that should help parents decide whether to inoculate their adolescent children.

Samsung BioLogics Co. Ltd. and Pfizer Inc. on May 12 denied a report that they were working together to produce in South Korea a Covid-19 vaccine developed by the U.S. drugmaker.

Novavax Inc. said on May 10 the company’s combined flu and Covid-19 vaccine produced functional antibodies against influenza and the coronavirus in a preclinical study.