Researchers have found 42.3% of people infected with COVID-19 still have symptoms after 30 days of infection, 33.8% after 60 days and 24.1% after 90 days. Infected people with more initial symptoms are more likely to have long term effects of the virus. Symptoms like anosmia, ageusia, difficulty concentrating, difficulty breathing, memory loss, confusion, headache, chest pain etc were significantly enriched in COVID-19 patients after 30 days.