Roll out - where you can get vaccinated in north Essex. Picture: NHS England WITH the coronavirus vaccination programme rolling out at full speed across the country, we have compiled a list of all the sites in north Essex administering the jab. First and second doses of the Covid-19 jab are being administered across the area at a mixture of mass vaccination centres, hospital hubs and GP surgeries for people in the four priority groups. Some mass vaccine centres across the county were forced to close earlier this week due to heavy snow, but they are now all back up and running for people needing their jabs.