Live coverage has ended on this blog, please click here for NBC News' latest coverage of Covid-19.
The controversial White House coronavirus adviser, Dr. Scott Atlas, resigned on Monday.
Atlas has no background in infectious diseases, has spread misinformation about the virus and downplayed its seriousness. President Donald Trump invited him to join the task force in August after having seen him on Fox News.
Meanwhile, an analysis of 4.4 million student test scores suggested the pandemic has exacerbated long-standing educational disparities, possibly setting the most vulnerable children even further behind.
- Map of U.S. hot spots and worldwide Covid-19 cases.
- Tracking surges in states across the country this winter.
- Map of travel restrictions and which states have a mask mandate.
- Click here for more of NBC News' Covid-19 coverage.
Portland homeless shelter hit by Covid outbreak
In Mississippi, more counties see mask requirement, but no statewide mandate
Maine governor in quarantine after possible exposure
How hospitals are preparing for mass vaccinations
Ambulance companies at 'a breaking point' after receiving little Covid aid
Tucson adopts nightly curfew for three weeks
Rhode Island opens second field hospital
CDC to issue new guidance on quarantine length
New York City blood supply 'down to just a few days,' mayor says
Maryland mobilizing 'medical staffing surge' as cases climb
Long lines for Covid-19 testing after Thanksgiving gatherings
First Covid vaccines to be offered to health workers, nursing homes, CDC panel says
Canada to maintain travel ban with U.S. as coronavirus continues unchecked
New Orleans swinger convention tied to 41 Covid-19 infections
Miami offering grocery store gift cards to residents struggling due to Covid-19
Florida becomes third state to pass 1 million Covid-19 cases
‘The most 2020 wedding’: Bride with Covid-19 gets married in quarantine
NIH head warns pandemic will 'go on and on and on' if people refuse to take vaccine
'Invisible Hands' brings food to people isolated due to Covid-19
Child under 10 dies from Covid-19 in Maryland
Nurses at New York hospital strike over staffing and safety amid Covid-19 surge
Rhode Island ER doc warns that pandemic is 'reaching a dire situation' in state
Starbucks giving free coffee to Covid-19 frontline workers in December
Chief adviser to Operation Warp Speed: Children should receive Covid-19 vaccine last
Iowa State allowing football and basketball fans back into games
FDA chief summoned to White House to defend vaccine timetable
N.J. to limit outdoor gatherings, pause indoor sports
November's Covid-19 tally: 4M cases, 37,000 dead
Moderna and Pfizer-BioNTech ask European regulators for coronavirus vaccine approval
Covid restrictions will remain in Philippines through holiday season
When Covid-19 closed schools, Black, Hispanic and poor kids took biggest hit in math, reading
Pfizer and BioNTech apply for emergency vaccine approval in Europe
Russian rapper 'Basta' criticized for holding concerts amid pandemic
