Indeed. I worked for a pharmaceutical company in 1989. The person I car pooled with worked in the "plant health" department. They had either weekly or fortnight

Indeed. I worked for a pharmaceutical company in 1989. The person I car pooled with worked in the "plant health" department. They had either weekly or fortnightly blood draws (memory fails) and any significant amount of nasty shit in their blood would prompt investigation at the least. When she disclosed her pregnancy to management, she was immediately moved out of lab work until she was no longer breastfeeding. So, it is possible to manage these kind of work environments safely, it's a deliberate choice to not care. Or a cultural decision that says that such things only matter for the highly paid PhDs in the lab, not for the replaceable blue collar workers.