https://www.cdc.gov/plague/diagnosis/index.html
Note the last line of this. IF YOU HAVE TRAVELED TO THE WESTERN USA.
Haven’t been there in decades. I have some cousins and other friends who still live there though.
“The untreated pneumonic form of the disease (in which it is inhaled into the lungs) has a mortality rate close to 100% and can kill within 24 hours. Let’s pretend that you are one of those unlucky people who catches bubonic plague. ... Y. pestis can detect the temperature outside.Feb 22, 2014”
“Pneumonic plague is the most serious form of the disease and is the only form of plague that can be spread from person to person (by infectious droplets).”