Montreal university developed a biosensor tattoo that detects fentanyl in the body and sends an alert to users smartphone and/or anyone else’s phone.
https://www.concordia.ca/news/stori...G4Rqd8gg6VgDpoWLJwnM2MQ3uwRWrfO9Z0cB2FL2YV3vM
https://www.concordia.ca/news/stori...G4Rqd8gg6VgDpoWLJwnM2MQ3uwRWrfO9Z0cB2FL2YV3vM