I am 29 yr old lady. I have got treated for Covid. On 26 Apr 21, I had my first symptom, On 04 May 21, I gave RT-PCR and the result was negative, however I was admitted in hospital since my lungs had got affected with CT score of 27/40 and O2 saturation value between 71-78. On 12 May 21, I got discharged from hospital with O2 saturation between 90 to 92. On 18 May 21, I was again tested negative in Rapid Antigen test, my O2 saturation between 92-96, and I moved out from Quarantine. However, on 19 May 21, I gave RT-PCR again and the result arrived on 20 May 21 as Positive with CT value of 35. Now my O2 saturation is between 94-98. In this situation, can you please tell me if I have possibly spread the virus to my family, should I quarantine again? Why was I tested negative in RT-PCR on 04 May 21 and tested positive on 20 May 21? Thank you