As Covid lab leak suspicion lingers, WHO urges China to share virus origin data
The source of the coronavirus, which is estimated to have killed 7 million people, has been a controversial mystery for years.
Epidemics
Ancient bones shed new light on debate over origins of syphilis
Study finds 9,000-year-old remains in Americas hold genomes of bacteria family that causes diseaseAfter the French king Charles VIII invaded Italy in 1494, an unknown and disfiguring disease erupted in the army camps and duly spread across Europe when …