Covid19 causes anosmia (and no other symptoms) in some. Of the infected, 66% in Germany presented with anosmia. A useful marker in the otherwise asymptomatic.
<blockquote class="twitter-tweet"><p lang="en" dir="ltr">There is the potential to reduce COVID-19 transmission by requesting that individuals with new onset of anosmia self-isolate. A lost sense of smell as marker of COVID-19 infection... for full details see below <a href="
https://t.co/udkBMwwJ1F">pic.twitter.com/udkBMwwJ1F</a></p>— ENT UK (@ENT_UK) <a href="
">March 20, 2020</a></blockquote> <script async src="
https://platform.twitter.com/widgets.js" charset="utf-8"></script>
Also, appears to attack testes, potentially causing infertility and low testosterone.
<blockquote class="twitter-tweet"><p lang="en" dir="ltr">The novel <a href="
https://twitter.com/hashtag/coronavirus?src=hash&ref_src=twsrc^tfw">#coronavirus</a> may cause testicular damage and male infertility, Chinese experts found, recommending infected men take tests for semen quality and hormone levels. <a href="
https://t.co/MC4jPAHueT">pic.twitter.com/MC4jPAHueT</a></p>— People's Daily, China (@PDChina) <a href="
">March 14, 2020</a></blockquote> <script async src="
https://platform.twitter.com/widgets.js" charset="utf-8"></script>
Oh, Covid19, you are a one!