doesn't matter if it's polio, doesn't matter if it's measles, doesn't matter if it's covid, alc cholera, you put that many people together, children and women packed in basements, these are areas where people's systems are weak, and infectious diseases can rip through populations like this. >> the director of health and care of the international federation of red cross and red crescent societies and joins me now from geneva, switzerland. thanks so much being with us. with russian forces surrounding and cutting off ukrainian cities. some have compared it to medieval warfare or the nazi siege of leningrad. give us a sense of what effect this is having on hospitals, on patients including some vulnerable sick children in ukraine. >> good morning, kim.