user1384: 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.

user22057: As I have said before, the tag "virus" would be sufficient as we don't have tags for dozens of viruses of biological importance. But yes, throw the others off and just use "coronavirus" for those few questions that are on-topic here.

user948: I suggest keeping covid-19 as well as coronavirus. COVID-19 is the disease caused by infection with the novel SARS-CoV-2 coronavirus. Since we cover both microbiology/virology and some health topics on this site, I can easily imagine on-topic questions where one of the tags is appropriate but not the other. Just my $2e-2.

1384: <p>The tagging of questions related to the <a href="https://en.wikipedia.org/wiki/2019%E2%80%9320_coronavirus_outbreak" rel="nofollow noreferrer">2019-2020 coronavirus outbreak</a> is a mess.  I've seen at least five related tags in use as of 2020-03-06:</p>

<ul>
<li><p><a href="https://biology.stackexchange.com/questions/tagged/coronavirus" class="post-tag" title="show questions tagged &#39;coronavirus&#39;" rel="tag">coronavirus</a>, 5 questions.  I'm aware other coronavirii exist, but the oldest question is dated 2020-02-02.</p></li>
<li><p><a href="https://biology.stackexchange.com/questions/tagged/2019-coronavirus" class="post-tag" title="show questions tagged &#39;2019-coronavirus&#39;" rel="tag">2019-coronavirus</a>, 1 question.</p></li>
<li><p><a href="https://biology.stackexchange.com/questions/tagged/sars-cov-2" class="post-tag" title="show questions tagged &#39;sars-cov-2&#39;" rel="tag">sars-cov-2</a>, 4 questions.</p></li>
<li><p><a href="https://biology.stackexchange.com/questions/tagged/2019-ncov" class="post-tag" title="show questions tagged &#39;2019-ncov&#39;" rel="tag">2019-ncov</a>, 2 questions.</p></li>
<li><p><a href="https://biology.stackexchange.com/questions/tagged/covid-19" class="post-tag" title="show questions tagged &#39;covid-19&#39;" rel="tag">covid-19</a>, 4 questions.</p></li>
</ul>

<p>The community should probably settle on one or two of those and make the rest aliases.</p>
 22057: <p>As I have said before, the tag "virus" would be sufficient as we don't have tags for dozens of viruses of biological importance. But yes, throw the others off and just use "coronavirus" for those few questions that are on-topic here.</p>
 948: <p>I suggest keeping <a href="https://biology.stackexchange.com/questions/tagged/covid-19" class="post-tag" title="show questions tagged &#39;covid-19&#39;" rel="tag">covid-19</a> as well as <a href="https://biology.stackexchange.com/questions/tagged/coronavirus" class="post-tag" title="show questions tagged &#39;coronavirus&#39;" rel="tag">coronavirus</a>. COVID-19 is the <em>disease</em> caused by infection with the novel SARS-CoV-2 coronavirus. Since we cover both microbiology/virology and some health topics on this site, I can easily imagine on-topic questions where one of the tags is appropriate but not the other. Just my $2e-2.</p>
