The blood samples of over 200people have tested negative for coronavirus in Andhra Pradesh overnight as the total cases remained at 348, a health department bulletin said on Thursday.No new COVID-19 cases were reported in the last 12 hours since 9 pm on Wednesday till 9 AM on Thursday, it said.All the 217 blood samples tested during the period have returned negative, it added.The total number of COVID-19 positive cases in the state stood at 348, with 335 active cases.In all, nine patients have recovered so far and were discharged from hospitals.So far four COVID-19 deaths have been reported in the state.