I should clarify: many dry labs do work with human or animal specimen slides/wax blocks (as mine works with cancer tumor blocks) - it’s just that dry labs don’t do processing. We get pre-processed samples where the “wet” work is already done. Then we scan in the slides so we can look at them digitally in a computer, or we take tiny bits out of specimens and send them to other places that do genetic analysis and then send us back the results for us to analyze. Dry labs that work only with formalin-fixed tissue aren’t biohazardous because there’s no pathogen risk.