I’m using Dynu for DDNS. They support subdomains as part of their DNS. You can configure nginx to service/route requests to each subdomain differently.
I opted for dynamic dns and reverse proxy. I configured my reverse proxy to use TLS and also to require client certificates, which I install on my devices. You get so much flexibility and added consistency to your application security that I feel it is a must.
The article states that the virus is very resistant to many environmental changes and can “survive” for a long time on clothes, boots, and even some pork products. This is probably one of many issues involved during an outbreak.