The World Health Organization says the virus can be transmitted in any kind of weather and that there is no reason to believe that cold...

Climate activists abseiled from bridges near Germany's financial hub Frankfurt on Monday in protest at the planned expansion of a m...

The Indian capital’s air quality levels plunged to “very poor” on Friday and a smoggy haze settled over the city, days after the state...

LONDON (Reuters) - "Human challenge" trials of potential COVID-19 vaccines, where volunteers are deliberately infected with t...