Swiss authorities say it is now safe for children under the age of 10 to hug their grandparents.
The Ministry of Health's head of infectious diseases, Daniel Koch, said scientists had concluded that young children do not transmit the virus.
However, he added that meetings should be short and not involve childcare.
Switzerland is one of the European countries that has begun to ease the lockdown measures imposed due to the pandemic.
BBC writes that this week, garden centers and hairdressers have been allowed to open their doors. Schools and shops will be allowed to reopen within two weeks.
Dr. Koch said at a press conference this week that advice to keep a distance between children and their grandparents was made when less was known about how the coronavirus was transmitted.
"Young children are not infected and do not transmit the virus," he said, quote BBC. "They just don't have the receptors to catch the disease."
Dr. Koch added that many grandparents "live to see their grandchildren" and that this was important for their mental health. He said it was not the children who posed a danger to elderly relatives, but their parents.
The revision of official advice in Switzerland came after consultation with experts at universities in Zurich, Bern and Geneva.
The advice only applies to young children who show no signs of illness, while older children should still avoid contact with grandparents. However, not all experts agree with the Swiss government's findings.
Germany's chief virologist, Christian Drosten, told Austrian broadcaster ORF that there was not enough data to say definitively that young children could not transmit the virus.
