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Catch up on coronavirus stories and special reports, curated by Mike Allen everyday

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Satellite images showing the mean tropospheric nitrogen dioxide density changes over China. Photo: NASA

Pollution levels have plummeted over China and it's "partly related to the economic slowdown following the outbreak of coronavirus," NASA said in a statement accompanying the release of satellite images demonstrating the nitrogen dioxide (NO2) changes.

Driving the news: The outbreak caused China's factory activity to fall to a record low of 35.7 in February from 50.0 in January, officials said Saturday, per the Financial Times. NO2, a key contributor to smog and a major health hazard, is the gas that's emitted by motor vehicles, power plants and other industrial facilities.

NO2 levels in Wuhan, China, the epicenter of the outbreak. Photo: NASA
This is the first time I have seen such a dramatic drop-off over such a wide area for a specific event."
— Fei Liu, air quality researcher at NASA’s Goddard Space Flight Center

Zoom in: NASA scientists first noticed the reduction in NO2 pollution in January near Wuhan, the epicenter of the COVID-19 outbreak. They then noticed changes in pollution levels across the country as the virus spread.

The big picture: Fei Liu, an air quality researcher at NASA’s Goddard Space Flight Center, recalled seeing a fall in NO2 levels over several countries during the economic recession that began in 2008, but that was more gradual.

  • Lunar New Year celebrations may have contributed to the big drop, but Liu noted the levels had not rebounded — as happened when there was a dip in Beijing during the 2008 Olympics before they rose again after the Games finished.
  • "This year, the reduction rate is more significant than in past years and it has lasted longer," Liu said. "I am not surprised because many cities nationwide have taken measures to minimize spread of the virus."

Go deeper: Coronavirus hits China's tech manufacturing

Go deeper

House passes $1.9 trillion COVID relief package

Photo: Screenshot via C-SPAN

The House approved President Biden's $1.9 trillion COVID relief package on a 219-212 vote early Saturday morning, sending it to the Senate for a possible rewrite before it gets to Biden's desk.

The big picture: The vote was a critical first step for the package, which includes $1,400 cash payments for many Americans, a national vaccination program, ramped-up COVID testing and contact tracing, state and local funding and money to help schools reopen.

8 hours ago - Health

Biden says it's "not the time to relax" after touring vaccination site

President Biden speaking after visiting a FEMA Covid-19 vaccination facility in Houston on Feb. 26. Photo: Mandel Ngan/AFP via Getty Images

President Biden said Friday that "it's not the time to relax" coronavirus mitigation efforts and warned that the number of cases and hospitalizations could rise again as new variants of the virus emerge.

Why it matters: Biden, who made the remarks after touring a vaccination site in Houston, echoed CDC director Rochelle Walensky, who said earlier on Friday that while the U.S. has seen a recent drop in cases and hospitalizations, "these declines follow the highest peak we have experienced in the pandemic."

Updated 8 hours ago - Politics & Policy

Coronavirus dashboard

Illustration: Annelise Capossela/Axios

  1. Health: Most COVID-19 survivors can weather risk of reinfection, study says — "Twindemic" averted as flu reports plummet amid coronavirus crisis
  2. Vaccine: FDA advisory panel endorses J&J COVID vaccine for emergency use — About 20% of U.S. adults have received first vaccine dose, White House says — New data reignites the debate over coronavirus vaccine strategy.
  3. Economy: What's really going on with the labor market.
  4. Local: All adult Minnesotans will likely be eligible for COVID-19 vaccine by summer — Another wealthy Florida community receives special access to COVID-19 vaccine.
  5. Sports: Poll weighs impact of athlete vaccination.