U.S. sailors who have their attempt to secure an exemption to the military’s COVID-19 vaccine mandate rejected have five days to get a jab, according to updated guidance released Monday. If they do not, commanders will begin processing them for discharge, the Navy said. The mandate deadline is Nov. 28 for active-duty sailors. Reserves have until Dec. 28 to become fully vaccinated against the virus that causes COVID-19. Fully vaccinated refers to both getting a full vaccination regimen and at least two weeks elapsing after the final shot. “In order to ensure a fully vaccinated force, it is U.S. Navy policy to separate all Navy service members who refuse the lawful order to receive the COVID-19 vaccination,” Vice Adm. John Nowell Jr., the chief of naval personnel, told commanders in a message dated Nov. 15. The Navy announced last month that all unvaccinated sailors without a pending or granted exemption would be …