Do bed bugs prefer certain blood types?

Ah, the eternal curiosity about our persistent friend Cimex lectularius! Studies suggest these insects don’t exactly check your blood type ID before dining. What they do respond to is carbon dioxide, warmth, and scent — cues that tell them a host is nearby. Some anecdotal evidence hints that people with Type O might be bitten more often, but science is still nibbling away at that question. Pun intended.