I thought you might be interested in some free icons for your COVID-19 Apps in the following:
“Free icons for coronavirus awareness.
Together with kind contributors, Iconfinder is giving away more than 300 free vector icons related to hygiene and awareness about the virus spread.
The icons can be used for hand-washing instructions, hygiene recommendations, and other initiatives fighting the virus spread.
Feel free to add them to signs, posters, flyers, and similar.
Available in PNG, SVG (scalable file format) and IconJar. All icons are licensed under Creative Commons BY-SA 3.0”