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The U.S. recorded more than 4,000 daily Covid-19 deaths for the first time Thursday, the highest one-day total since the pandemic began.
There was also a record number of cases, 268,883, showing that the national outlook is worsening by the day.
That news came as a new mutant variant of the disease first identified in the U.K., which has been shown to be more infectious, has been detected across the country including in Pennsylvania, Texas and Connecticut.
- 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.
Nearly 270,000 new Covid cases reported in U.S. on Friday
Los Angeles County reports record number of deaths
Biden to get second vaccination Monday
Symptoms can linger at least six months, Wuhan study finds
150 military medical personnel deploy to help Los Angeles-area hospitals
CDC has not seen emergence of a highly contagious U.S. variant of coronavirus
Florida launches new vaccination program at Publix Supermarkets
CDC director says Capitol riots likely a 'surge event'
White House task force warns states of 'aggressive community spread'
New York diverts Covid-19 vaccine doses after local plan to vaccinate teachers
U.K. reports highest daily death toll since pandemic began
As U.K. variant spreads in U.S., scientists warn that country isn't doing enough to track Covid strains
Head of NYPD tests positive for Covid
Ex-FDA head: Best case next winter is 'tens of thousands' of deaths
Iran's top leader bans vaccines from U.S., Britain
London mayor declares 'major incident' as Covid threatens to overwhelm hospitals
California, Arizona, New York set pandemic records for Covid cases, deaths
Economy lost 140,000 jobs last month, in final report of Trump presidency
U.K. approves Moderna vaccine
