I have no idea, all I know is that when Son(who lives in WA) had to go to ER for the second time (first time they gave him Steroids and an anti viral cocktail and sent him home the next day) but a few days later had developed v-Pneumonia while fighting covid, his oxy and BP kept dipping out, they had given him "antibody infusion" and sent him home the next morning having stabilized and is still recovering a week later but, getting much better.