it looks like there wasn't one? their definition of infected vs uninfected is not giving a placebo intervention, but they infected the whole set of subjects and it just didn't take / the immune system gobbled it.
> Volunteers were divided into two groups for analysis: those who exhibited sustained viral infection, defined as having at least two consecutive quantifiable viral detections by qPCR (infected), and the remainder (uninfected).
:blobcatglare2: every time i see studies without a real control group i begin screaming internally
@mac_ack maybe but when a paper has no actual control group i tend not to care what it says :neocat_woozy:
from what i can tell they tried to infect the whole group and about half of them either failed to infect (happens) or had good immunity, so all they actually did was compare high and low immunity cases, they didn't actually test a placebo group (or if they did, i didn't find it)
@icedquinn covid brain fog is real as is a loss of smell /taste and other symptoms like sneezing & coughing. Being sick sucks, but eventually you recover.