A man said he "couldn't breathe at all" when walking up the stairs and developed a severe lung infection after vaping for four years. David Becker started vaping at the age of 22 while trying to kick his smoking habit, as he assumed e-cigarettes were healthier for him. However, not long after he began vaping, the 30-year-old said his illnesses "began mounting up in waves" and he was "coughing constantly". David, from Leeds, said he thought his cough was caused by a cold or allergy, but it