This is how covid is spreading....

My stepson and his gf got covid, they stayed home for the last week. He got worse, went to ER got told it was a covid pneumonia and given meds. Hes doing better now resting.. well the DR. told his gf that since she hasnt had any symptoms for last couple days.. before they said you were contagious for weeks/months.. now they just let anyone go if no more symptoms?