In Florida, cockroach allergens can linger long after the roaches disappear,...
https://spark-wiki.win/index.php/What_Does_%E2%80%9CSensitized_and_Exposed%E2%80%9D_Mean_for_Asthma_Risk%3F
In Florida, cockroach allergens can linger long after the roaches disappear, making asthma symptoms worse for many families year-round. Even a few hidden spots can cause problems because these allergens stick around in dust and crevices