
A study published on Thursday on the use of hydroxychloroquine in Brazil to treat Covid-19 found the drug ineffective, the latest blow to President Jair Bolsonaro's push for its widespread use.

The mayor of Mexico City warned on Friday of a possible resurgence of coronavirus cases in the sprawling capital in the coming months, noting that hospitalizations have been on the rise in recent days.

China launched a rover to Mars on Thursday, another milestone for its space program after putting humans into orbit and landing a probe on the moon. It is among a trio of nations, along with the United Arab Emirates and the United States, launching missions to the Red Planet this month, taking advantage of a period when Mars and Earth are favorably aligned.

White House advisor Chris Liddell will be Washington's nominee to be the next head of the OECD, an administration official said on Friday, putting a Trump ally in the running to lead the association of advanced economies.

Dogs with a few days of training are capable of identifying people infected with the coronavirus, according to a study by a German veterinary university.

Sao Paulo, the biggest city in South America, postponed its 2021 Carnival celebrations on the same day that Formula One scrapped its next planned race here, underlying the enduring effects policymakers expect the coronavirus pandemic to have on Brazil.

A video of a mother running behind a van carrying Peru's President Martin Vizcarra and begging him to save her husband from COVID-19, has gone viral. Mr. President, Don't go! screams a tearful Celia Capira as she begs for a hospital bed for her husband in the video shot on Sunday in Peru's second-largest city, Arequipa.

European Union states have agreed on common hygiene standards such as social distancing and wearing face masks on planes and at airports to help curb the spread of the new coronavirus, German Transport Minister Andreas Scheuer said on Thursday

COVID-19 lockdowns worldwide led to the longest and most pronounced reduction in human-linked seismic vibrations ever recorded, sharpening scientists' ability to hear earth's natural signals and detect earthquakes, a study found on Thursday. Vibrations travel through the earth like waves, creating seismic noise from earthquakes, volcanoes, wind and rivers as well as human actions such as travel and industry.

Samples of wastewater from the Paris sewage system have been showing traces of COVID-19 again since the end of June, having vanished when France imposed a lockdown, according to the head of the laboratory leading the research.