AmericaSpeaks TheVoiceOfJoyce After just listening to TWIV TV #638 first hour, I am convinced that there is little immunity to be expected from Covid 19 . Antibodies decline after 3 months & a person testing positive may test positive again. There is no guarantee that herd immunity will ever occur.The quicker we Mandate mask wearing and maintain social distancing the better. It would be in our own self interest to self quarantine as a Country for 3 weeks, everybody. Then maintain caution & test the entire population for antibody response.