This is the 4920th most frequent Russian word.
ковида
The Russian word "ковида" is a colloquial term referring to COVID-19.
The word 'ковида' is used here in the genitive case to indicate the disease from which the subject recovered.
Я выздоровел после ковида.
I recovered from COVID.
The word 'ковида' appears in the genitive case to denote the reason or cause of societal change.
Общество изменилось из-за ковида.
Society has changed because of COVID.
Here, 'ковиде' (used in the prepositional case in Russian) indicates the topic of the article authored by the doctor.