A study of children who had a tracheostomy and prolonged ventilation {at home|at home} showed that 75% of them were vaccinated against {colds|flu|colds}, {but|however} out of 53%, {who|what} {They completed|completed the course of primary vaccination against covid-19, #file_links["C:\Users\Admin\Desktop\file\gsa+en+one4anotherLinkplan150420252P2URLBB.txt",1,N]only 23% received the recommended additional medications.