New Delhi: Delhi Health Minister Satyendar Jain, who is in hospital for COVID-19 treatment, showed some improvement on Thursday but his fever has not yet subsided, senior officials said.The 55-year-old minister is getting oxygen support on and off as per requirement, they said.Jain had tested positive for COVID-19 on Wednesday, a day after he was admitted to Rajiv Gandhi Super Speciality Hospital (RGSSH) here after running high-grade fever and suffering sudden drop in oxygen levels."His fever is down a bit today.