But UNHCR chief Filippo Grandi stressed the need to protect some of the world's most vulnerable against the disease, which shows mild symptoms in most cases but which often provokes severe illness and death in the weakest individuals.
"The virus can affect anyone and it is our collective responsibility to ensure that the global response includes all people," Grandi said in a statement.
"Allowing full access to health services, including for the most marginalised members of the community, is the best way to protect us all," he said.
"Everyone on this planet - including refugees, asylum seekers and internally displaced people - should be able to access health facilities and services."
More than 70 million people globally been forced by conflict, persecution, violence and abuses to flee their homes, including more than 20 million people living as refugees, according to UN data. A full 84 percent of the world's refugees are meanwhile hosted in low or middle-income countries with weaker health, water and sanitation systems, the UNHCR pointed out. "Refugees and internally displaced people often find themselves in places that are overcrowded or where public health and other services are already overstretched or poorly-resourced," it said.