HOUSTON – The first day we knew about the “community spread” of coronavirus was the day the rodeo was canceled on March 11, 2020. Now, many of you are getting antibody tests and finding out you’ve had coronavirus but claim symptoms happened early in March, or before then. Some doctors now think back to early in the year, after people returned from holiday travel, and think what appeared to be a respiratory virus going around, might have been coronavirus the whole time. Professor of Infectious Diseases at UT Health Luis Ostrosky, MD, said results like these help doctors with a very important mystery. We won’t really know if they had corona or not unless we have samples from that time," Ostrosky said.