Umair Irfan
Former correspondent
Latest articles by Umair Irfan
Billions of hungry insects are threatening to cause famine amid the coronavirus pandemic.
The White House is giving states contradictory guidance on what counts as safe.
Symptoms of the novel coronavirus can vary a lot, if an infected person experiences them at all.
Another intense allergy season is underway as the Covid-19 pandemic rages.
The debate over how to allocate limited Covid-19 tests, explained.
The arrival of the invasive species is yet another threat to beleaguered bees in the United States.
Recent studies showed mixed results about remdesivir’s effectiveness in treating the new coronavirus.
What to do if you suspect you might have Covid-19.
Why two California surveys caused an uproar among researchers.
How your body will try to save you from the new coronavirus.