Umair Irfan
Former correspondent
Latest articles by Umair Irfan
After four years of Trump, the EPA is poised to make a dramatic turn on pollution, climate change, and justice.
The best Covid-19 vaccine for you is most likely still the first one you can get.
Scientists say they still have more to learn about the symptoms of Covid-19 infections, long Covid, and the new variants.
Covid-19 vaccines are here. So are new mutations. Here’s what you should know.
The FDA could make an emergency use authorization as soon as this weekend, paving the way for distribution.
Local health clinics and community groups are just as important as mass vaccination sites in the rollout.
What it looks like when a place that rarely dips below freezing gets a blast of Arctic air.
Is the cold wave that froze Texas this week a unique event or a sign of what’s to come?
A sudden spike in energy demand and a loss of natural gas, coal, nuclear, and wind energy during a winter storm triggered blackouts across the state.
What we know and don’t know about how Covid-19 vaccines slow the spread of the virus.