COVID-19 patients in the two states have a median stay of five days in the hospital before death compared to 13 days to death from the date of hospital admission in the US.Follow-up testing of exposed contacts revealed that 70 per cent of infected individuals did not infect any of their contacts, while 8 per cent of coronavirus positive patients accounted for 60 per cent of observed new infections.The researchers said this finding presents the largest empirical demonstration of superspreading.They said the findings "may indicate the identification of less-severe infections through active case-finding."Andhra Pradesh and Tamil Nadu are among the Indian states with the largest healthcare workforce and public health expenditures per capita,.