The Department of Defense updated its guidance for troops, as well as civilians and contractors, regarding its policy for COVID-19 quarantine and isolation. The new rules largely align with recently issued guidance from the Centers for Disease Control and Prevention (CDC) and were released days after Defense Secretary Lloyd Austin, who is fully vaccinated and boosted, tested positive for the virus while on leave at home. The Pentagon memorandum (pdf) released on Friday said those who have signs or symptoms “consistent with COVID-19” such as fever, cough, or shortness of breath, are expected to let their commander or supervisor know and stay home. Those who end up testing positive for COVID-19 must stay out of the workplace for at least five days, Gilbert Cisneros, undersecretary of defense for personnel and readiness, stipulated in the memo. Pentagon personnel can return to work after that only if they have no symptoms or are not …