barthusz

This plugin creates a floating button with a link to a read more page (which you have to create yourself), meant for COVID-19 information. You can choose from different icons and set the colors, text, link and position of the button (including offset) in the WordPress backend. It is aimed to be simple and lightweight.

COVID-19 Float Button

Creates a floating button with a link to a read more page.

abuomama

This is a very simple plugin with the sole purpose of allowing website owners a quick way to add a COVID-19 notice to their website. This free plugin is intended to provide a stop-gap solution and does not attempt to compete with more full-featured “banner” plugins.
This plugin now offers additional data display features by using the shortcode <code>[covid19_popup]</code>. See Screenshot to see how it works.
In v2 you don’t need to use shortocde for display the data. Actually we have big changed with this plugin, there are too many options to display data and also you can change the appreance.
we are using <a href="https://covid19api.com/" rel="nofollow ugc">COVID19API</a> apis in our plugin. 
So plugin functionality and data totally depends on third party APIs. (We can’t provide any support if there is any downtime in third party APIs). 
For more information and Please check <a href="https://covid19api.com/" rel="nofollow ugc">COVID19API</a> 
Please check PRIVACY POLICY. 
https://covid19api.com/privacy-policy.html

COVID-19 Float Button vs Coronavirus (COVID-19) Live Update Popup