asymptomatic Covid-19 infections

AI can tell who will need a respirator and determine who ought to be first in line for a vaccination for Covid-19
Could llama nanobodies become a powerful weapon against COVID-19
A battery-operated reusable N95 smart mask for Covid-19?
Asymptomatic Covid-19 infections are a big deal: They are up to 45 percent of SARS-CoV-2 infections