Antikithira is a composite word: Anti (a prefix meaning opposite) + Kithira (a nearby island). So maybe it is the other way round, "antariksha" is named after the island ?
TLDR of Talib's take:
The study says:
"We are not sure whether wearing a mask OUTSIDE YOUR HOUSE (but not at home) will give you more protection than distancing from catching Covid INSIDE YOUR HOUSE."
Statistically, junk!