COVID-19 updates: White House press secretary Jen Psaki tests positive

Two South Florida school districts may be changing their polices on mask mandates in schools as COVID-19 cases decline.

A Broward County Public Schools spokesperson told ABC affiliate WPLG that an item could be added at a school board meeting Tuesday "regarding district’s COVID-19 protocols including the use of face coverings.”

The district had said it would revisit the mask mandate when the COVID-19 positivity rate reached 3% or lower for 10 consecutive days. Broward County has reached that threshold, the county's health department data shows.

Miami-Dade County Schools Superintendent Alberto Carvalho also indicated there may be a change to its mask mandate policy.

The school board is looking at several metrics including hospital admissions, community transmission and daily student cases. Carvalho said Friday would be a benchmark day.

Carvalho said last week that a new plan could entail "a mandatory mask policy but with an unrestricted, unrestricted, parent opt-out provision."

The European Medicines Agency on Monday approved the Moderna booster (which is a half dose of the initial booster) for people 18 and older.

The booster "given 6 to 8 months after the second dose led to a rise in antibody levels in adults whose antibody levels were waning," the EMA said.  

-ABC News' Christine Theodorou

The federal government on Monday released more details about how foreign tourists and other non-citizen, non-immigrant people flying to the U.S. can comply with recently-announced rules requiring them to be fully vaccinated.

These rules go into effect on Nov. 8.

People will be able to submit proof of vaccination to airlines electronically or via paper, an official said.

All vaccinated people -- Americans and non-Americans -- need to show proof of a negative test taken within three days before departure.

For unvaccinated people -- both Americans and non-Americans -- you need to show proof of a negative test within one day before. Children ages 2 to 17 must take a test but those under 2 don’t need to test.

Vaccine exemptions include: children under 18; some medical exemptions; and people traveling on non-tourist visas from countries with low availability of vaccines (signified by a country having a vaccination rate less than 10%). The U.S. will follow a list maintained by the WHO and these people will need have a “specific, compelling reason” for coming to the U.S., a senior administration official said.

The exemptions will represent a “very, very small number” of travelers to the U.S., a senior administration official said.

-ABC News' Ben Gittleson

In the last month, the daily case average in the U.S. has dropped by nearly 43% thanks to falling metrics in states like Florida, Mississippi and Louisiana, which have all seen their case averages drop by nearly 90% or more since August, according to federal data.

But in recent weeks, cases have been creeping up in several states in the Northeast and the upper Midwest, including Minnesota and Michigan.

Alaska currently has the country's highest infection rate, followed by Montana, Wyoming, Idaho and North Dakota, according to federal data.

About 52,000 COVID-19 patients are currently hospitalized across the U.S., a major drop from the 104,000 hospitalized patients in late August.

But the U.S. death toll remains persistently high, with nearly 1,300 new deaths being reported each day, according to federal data.

-ABC News' Arielle Mitropoulos