Hand-washing and social distancing are crucial in the fight against the coronavirus pandemic.
That is nearly impossible for refugees and migrants who live in deplorable conditions.
Aid groups are warning of carnage, if there is an outbreak in overcrowded camps, such as in Bangladesh, Greece, Syria, Yemen and Venezuela.
Humanitarian activists are appealing for hygiene kits, water sanitation and training for health workers to protect refugees.
And governments providing shelter are under pressure to prevent a humanitarian catastrophe.
But with carers sick, volunteers gone and governments overwhelmed – what needs to be done to save them?
Presenter: Dareen Abughaida
Apostols Veizos – director of the medical operational support unit at Doctors Without Borders (Medecins Sans Frontieres, or MSF) in Greece
Murie Tschopp – country director for the Norwegian Refugee Council
Babar Baloch – spokesman for the United Nations Humanitarian Agency (UNHCR)