My vampire archaeologist once died from... I don't even know what to call it... a lightning curse? He was cursed in any case, and I didn't do anything about it in time (I thought I had more), so he got killed by an electric shock out of nowhere after taking a swim in the Omiscan Royal Baths.
https://abload.de/img/zweisensenmnner19jcf.jpg
My experience with vampires is that they don't need to pee or sleep, aren't affected by extreme temperatures and can't starve to death, but other than that, they're just as vulnerable to environmental hazards as other sims - arguably even more so because the sun can kill them too. But if you give them sun immunity, combined with a teleporting ability that saves them from walking for miles through the jungle, then yeah, their lack of basic human needs makes them the most persevering archaeologists you can hope for.