Wall Geckos can give you Typhoid Fever and Tape worms!
You may have come across the video of a wall gecko having fun with someone's toothbrush by leaking it without permission.
The video has been shared many times on social media and Instant messaging like Whatsapp. It has got many asking the question Is wall gecko dangerous? Wikipedia will not help you with that question as the person who wrote about gecko there said the answer is no.