A new study says a long handshake can spread your DNA to things you didn't touch. New DNA research was revealed last week at the annual meeting of the American Academy of Forensic Sciences. In handshaking experiments, researchers found that people who never picked up a knife became the major source of DNA on the knife about seven-percent of the time!
The study found the person's DNA was transferred to the knife by someone they shook hands with. The findings suggest that even brief contact with another person could spread DNA far and wide, which could complicate crime scene investigations. Ok then, no more handshakes for me...from now on it's a fist bump!
Bonus! The study also showed that coughing, sneezing, and “spewing while talking” also can put your DNA on stuff you didn’t touch. Great!
Source: Science News