I was able to find information that the air quality (CO2 level) we breathe in a room directly affects the likelihood of contracting airborne infections such as tuberculosis, measles, flu and rhinovirus infections. Among the latter are coronavirus (COVID-19), a pandemic that began in China in December 2019 and spread rapidly around the world.
You can read in more detail on my website: English version; Russian version.
I offer a simple device diagram for measuring the level of CO2 and non-contact temperature measurement.
Perhaps this will be useful to those who are forced to quarantine while indoors with other people.
Take care of yourself.