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.
Israeli troops and tanks pushed on Saturday into parts of a congested northern Gaza Strip district that they had previously skirted in the more than seven-month-old war, killing and wounding dozens of Palestinians, medics and residents said.
Slovak Prime Minister Robert Fico is no longer in immediate danger but still in a serious condition, his deputy said on Sunday, four days after an assassination attempt that sent shockwaves through Europe.
At least 47 people have died after continued heavy rain and flooding in northern Afghanistan, an official said on Sunday, a day after a similar number were killed in a central province.
Russian airstrikes killed at least ten people and injured many others in a recreation area just outside Ukraine's northeastern city of Kharkiv on Sunday, local officials said.