The World Health Organisation (WHO) said that that transmission of the novel coronavirus by asymptomatic carriers is "very rare".
"From the data we have, it still seems to be rare that an asymptomatic person actually transmits onward to a secondary individual," WHO official epidemiologist Maria Van Kerkhove said during a briefing in Geneva.
"We have a number of reports from countries who are doing very detailed contact tracing. They're following asymptomatic cases, they're following contacts and they're not finding secondary transmission onward."
Her observations come as WHO Director General Tedros Adhanom Ghebreyesus asserted that the coronavirus pandemic situation was worsening around the globe and warned countries against complacency.
"More than six months into the pandemic, this is not the time for any country to take its foot off the pedal," told an online briefing.
So far, over 7.2 million people have contracted the virus around the world, with the death toll at more than 408,000.
Israel's military carried out airstrikes in Rafah on Monday, residents said, hours after Israel told Palestinians to evacuate parts of the southern Gaza city where more than a million people uprooted by the war have been sheltering.
Russia said on Monday it would practice the deployment of tactical nuclear weapons as part of a military exercise after what Moscow said were threats from France, Britain, and the United States.
Heavy rains battering Brazil's southernmost state of Rio Grande do Sul have killed at least 83 people, authorities said on Monday, up from 78 reported a day earlier.
Ukrainian drone attacks on two buses taking people to work killed six people and injured another 35 in the Belgorod region of Russia, the governor said on Monday.
US and Philippine armed forces fired missiles and artillery to thwart a simulated invasion in the Philippines' northern waters facing Taiwan on Monday, in a show of military force and strengthening ties as regional tensions rise.