If its one person, its okay, if multiple people are blowing into the device you have a connection. This connection is what increases the risk of potentially catching an illness like mono, the flu, or oral herpes
"They still had pretty high levels of hand nicotine," said Mahabee-Gittens
When combined with tobacco use, the risk becomes even more pronounced
The chance of a miscarriage also increases if you're a smoker or subjected to second-hand smoke during your pregnancy
Smokers using the real patch are more than twice as likely to quit compared to those using a fake patch
So, for example, if you see two packets of Marlboro(s) with the same code, then that could be an indication the product is counterfeit. The code 5OE WW9 6AR JFC is known to be on a batch of counterfeit cigarettes packs that have been circulating in Oxfordshire