the warning was made as the chief executive of nhs providers said "very, very few" coronavirus patients in hospital in england have received two covid jabs, showing the vaccines provide "very high" levels of protection. but he warned that hospitals are dealing with a heavy backlog of cases. our health correspondent catherine burns reports. ready, steady, go. we are in a race, vaccines against the virus, and this was the start on december eight. maggie keenan was the first person in the uk to get vaccinated outside of clinical trials. that was less than six months ago. now, about three quarters of adults have had their first dose, three quarters of adults have had theirfirst dose, and three quarters of adults have had their first dose, and almost half have had both. the government target has always been to offer a job to all adults by the end ofjuly. now there is a new ambition. we all adults by the end ofjuly. now there is a new ambition. we hope to be able to protect _ there is a new ambition. we hope to be able to protect with _ there is a new ambition. we hope to be able to protect with two - there is a new ambition. we hope to be able to protect with two doses, l be able to protect with two doses, all the other 50s, before the 21st