Unvaccinated 4-year-old in Jerusalem tests positive for mutated version of disease; parents urged to get their children's inoculations up-to-date

With no case of virus recorded in continent in 4 years, World Health Organization says threshold for eradication has been met

Berlin-based musicians Daniel Kahn and Sveta Kundish exploit parallels to COVID-19 in 104-year-old ballad about disease and injustice by great 20th century US immigrant composer

Scientists around the world have detected virus in sewage systems, but company says its tech can give a more precise location of an outbreak, potentially helping control diseases