World
Coronavirus’s True Lethal Power Still Eludes Disease Experts
- Many cases may fly below radar as tests administered sparingly
- New tools may help better gauge Covid-19’s scope and virulence
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Even the world’s top infectious-disease specialists still aren’t sure how lethal a threat the coronavirus presents.
World Health Organization Director-General Tedros Adhanom Ghebreyesus said this week that the new virus has killed about 3.4% of those diagnosed, a chilling mortality upgrade that far eclipses seasonal flu’s death toll.