Umair Irfan
Former correspondent
Latest articles by Umair Irfan
Masks, distancing, testing, and proximity sensors: The NFL’s Covid-19 playbook, explained.
A new report details what needs to happen to meet climate change goals.
More treatments are available for Covid-19 as hospitalizations spike, but some drugs are sitting on the shelves unused.
The variant carries mutations that may weaken the effect of vaccines, and Moderna is now exploring changes to its vaccine.
The new mutations first discovered in the UK and South Africa are spreading fast around the world — and could diminish the effectiveness of the existing vaccines.
The Affordable Clean Energy rule, which replaced Obama’s Clean Power Plan, would’ve led to more power sector emissions.
Thousands of people in clinical trials got the placebo instead of the vaccine. When should they get the vaccine for real?
Just because you got a Covid-19 vaccine doesn’t mean you’re invulnerable to reckless behavior.
10 ways Biden plans to fight climate change, with or without Congress.
A new, more transmissible Covid-19 variant has been detected in Colorado and California.