The tagging of questions related to the 2019-2020 coronavirus outbreak is a mess. I've seen at least five related tags in use as of 2020-03-06:
coronavirus, 5 questions. I'm aware other coronavirii exist, but the oldest question is dated 2020-02-02.
2019-coronavirus, 1 question.
sars-cov-2, 4 questions.
2019-ncov, 2 questions.
covid-19, 4 questions.
The community should probably settle on one or two of those and make the rest aliases.