COVID-19 live updates: Judge rules governor stop banning mask mandates in schools

Delta is raising health insurance premiums for unvaccinated employees by $200 a month to cover COVID-19 costs like potential hospitalization, which the airline says has cost it $40,000 per person on average.

In recent weeks, all Delta employees hospitalized with COVID-19 were not fully vaccinated, Delta CEO Ed Bastian wrote in a memo to employees.

Currently 75% of Delta employees are vaccinated, according to the airline.

The health insurance premium begins Nov. 1.

Unvaccinated employees will also have to wear masks indoors and be required to take a weekly COVID test beginning Sept. 12.

-ABC News' Mina Kaji

Moderna has finalized submission of its application to the Food and Drug Administration for full approval of its COVID-19 vaccine, the company announced Monday.

It's not yet clear how long the FDA will take to review Moderna’s application.

Pfizer completed its vaccine application in May and was granted full approval on Monday.

-ABC News' Eric Strauss

In the midst of a delta variant surge, a new study finds that giving a booster dose of the Johnson & Johnson shot six months after primary vaccination results in a nine-fold increase of a crucial antibody response, according to a company press release.

Meanwhile, a prior study found that people vaccinated with the Johnson & Johnson vaccine still had a durable immune response at least eight months later, even without a booster.

Collectively, the findings could help inform the U.S. government's recommendations about booster shots for the 14 million people who received the single-shot Johnson & Johnson vaccine.

Boosting after six months "appears to be safe, and boosts immune responses substantially," Dr. Dan Barouch, Ph.D., director of the Center for Virology and Vaccine Research at Beth Israel Deaconess Medical Center, told ABC News.

-ABC News' Sony Salzman

Several Paralympic athletes have tested positive for COVID-19 in Tokyo in recent days.

According to daily figures released by the Tokyo 2020 organizing committee, at least eight positive cases have been confirmed among unnamed Paralympic athletes so far, with two new cases reported on Wednesday following the opening ceremony.

The 2020 Summer Paralympics officially opened in the Japanese capital on Tuesday, after a yearlong delay due to the coronavirus pandemic. Like the 2020 Olympics, which ended on Aug. 8, this year's Paralympics is taking place under a state of emergency as Japan struggles with a growing COVID-19 crisis.