NEW DELHI : In tune to the union health ministry’s decision of home isolation of mild symptomatic covid-19 patients, the World Health Organization (WHO) in a scientific brief has said that it appears safe to release such patients from isolation based on scientific evidence to prevent straining the limited health resources.The WHO said that evidence showed the rarity of virus that can be cultured in respiratory samples after 9 days after symptom onset, especially in patients with mild disease, usually accompanied by rising levels of neutralizing antibodies and a resolution of symptoms, it appears safe to release patients from isolation based on clinical criteria that require a minimum time in isolation of 13 days, rather than strictly on.