Former PM Manmohan Singh admitted to AIIMS Delhi after testing positive for Covid-19 Former Prime Minister Manmohan Singh has tested positive for coronavirus and has been admitted to AIIMS Delhi. advertisement Former Prime Minister Manmohan Singh. (Picture Credits: Reuters) Former prime minister and veteran Congress leader Manmohan Singh has been admitted to the All India Institute of Medical Sciences (AIIMS) Delhi after testing positive for coronavirus on Monday. Prime Minister Narendra Modi, Congress interim president Sonia Gandhi, Congress leader Rahul Gandhi, Delhi Chief Minister Arvind Kejriwal were among the many leaders who wished former PM Manmohan Singh a speedy recovery.