Der Polioausbruch in New York lässt sich nicht mehr auf Einzelfälle begrenzen. Mangelnde Hygiene und Impfskepsis begünstigen die Ausbreitung des Virus. Wissenschaftler schlagen Alarm. <em
kindergartenerses, against businesses, against [inaudible] they are using rocket artillery, missiles against entire city districts which never has and doesn t have now any military infrastructure. reporter: ukrainian officials say that russian fighters are now inside kharkiv. there is desperate street ballots going on inside that city battles. and one thing we ve seen a number of times on social media, it s hard to verify, and that is people standing in front of russian tanks men, women alone, sometimes in groups, blocking these tanks and around a moredded vehicles from moving into their village, certainly not the reception russian soldiers thought they would get on the grown here in ukraine. will: steve, when you talk about the role of civilians, i read in kyiv there is now a curfew and the reason being it s so hard to tell ukrainian civilians from russian saboteurs. that, i think, is according to the mayor of kyiv and the president of ukraine.