https://www.npr.org/sections/goatsandsoda/2021/08/29/ [login to see] /the-troubled-history-of-vaccines-and-conflict-zones
On March 23, 2020, with the deadly coronavirus reported in 167 countries and territories, United Nations Secretary-General António Guterres called for a global ceasefire to support a public health response. It was the first global ceasefire appeal since the agency was founded in 1945, in the aftermath of World War II. "The fury of the virus illustrates the folly of war," Guterres said. "End the sickness of war and fight the disease that is ravaging our world."
On the ground, little changed. More than a dozen armed groups, from the National Liberation Army in Colombia to the Communist Party of the Philippines, initially endorsed Guterres' appeal, but most offers to lay down arms were either one-sided or did not culminate in a formal ceasefire agreement. A U.N. Security Council resolution that July, which affirmed Guterres' plea, also went nowhere. By fall 2020, the idea of a global ceasefire — which, in all of world history, has never taken place — was off the table.
On Feb. 26, 2021, the Security Council tried another tack. It passed Resolution 2565, which less ambitiously but more pragmatically called for a "sustained humanitarian pause" in order to immunize the world. In this case, there were recent historical precedents: In the 1960s, representatives from the World Health Organization launched its intensified program to eradicate smallpox — focusing on countries such as Ethiopia and present-day Bangladesh, where the disease was endemic and where public health officials had to work around conflicts in order to bring lifesaving vaccines to civilians.