Fans attending baseball, football and outdoor music events in Los Angeles County will be required to wear a mask starting on Aug. 20 regardless of their vaccination status, according to an order on Aug. 17 from the health department.

Young men could be at higher risk of contracting Covid-19 than previously recognized, researchers suggested, citing computer models.

The Biden administration plans to begin administering Covid-19 booster shots to Americans as early as mid or late September, pending authorization from the U.S. Food and Drug Administration, a source familiar with the discussions told Reuters on Aug. 16.

Bharat Biotech’s a two-dose, injectable Covid-19 vaccine Covaxin is authorized in India for ages 12 and up. The company is moving forward with a second vaccine against the novel coronavirus with a different mode of administration. 

Pfizer BioNTech, COVID booster

Pfizer Inc. and the company’s German partner BioNTech SE submitted to U.S. regulators the initial data from an early-stage trial toward seeking authorization of a booster dose of their Covid-19 vaccine, the drugmakers said on Aug. 16.

The number of children hospitalized with Covid-19 in the United States hit a record high of more than 1,900 on Aug. 14, as hospitals across the South were stretched to capacity fighting outbreaks caused by the highly transmissible Delta variant.

The U.S. Food and Drug Administration approved Pfizer’s tick-borne encephalitis vaccine TICOVAC to prevent TBE in people aged 1 year and older.

An antiviral treatment under development by Atea Pharmaceuticals is showing promise against Covid-19.

Moderna, COVID vaccine

The U.S. Food and Drug Administration authorized a third dose of Covid-19 vaccines by Pfizer-BioNTech and Moderna for people with compromised immune systems.

Drugmakers Pfizer, BioNTech and Moderna are expected to reap billions of dollars from Covid-19 booster shots in a market that could rival the $6 billion in annual sales for flu vaccines for years to come, analysts and healthcare investors say.