![Dr. Coby Schal is studying bedbugs, their DNA, how they communicate and whether they transmit disease. He suspects the bugs came from Africa or South America. (Photo by Robert Willett/Raleigh News & Dr. Coby Schal is studying bedbugs, their DNA, how they communicate and whether they transmit disease. He suspects the bugs came from Africa or South America. (Photo by Robert Willett/Raleigh News &](https://c8.alamy.com/comp/2F0J0N1/dr-coby-schal-is-studying-bedbugs-their-dna-how-they-communicate-and-whether-they-transmit-disease-he-suspects-the-bugs-came-from-africa-or-south-america-photo-by-robert-willettraleigh-news-amp-observermctsipa-usa-2F0J0N1.jpg)
Dr. Coby Schal is studying bedbugs, their DNA, how they communicate and whether they transmit disease. He suspects the bugs came from Africa or South America. (Photo by Robert Willett/Raleigh News &
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