The manufacture date is usually the first 6 digits of the batch code (YYMMDD format)
Measures COVID-19-Related Measures COVID-19 Testing, Infection, or Exposure Respondents were asked whether they had been tested for COVID-19, had a positive test, had a health care provider tell them they had COVID-19, believed that they had ever had COVID-19, and had a household member or close contact infected with COVID-19
Cela dit, quelques preuves montrent tout de mme que ces appareils peuvent aider liminer l'odeur de fume secondaire
Approximately one-third (442/1460 = 30.3, 95% CI 27.932.7%) of the responders had ever used e-cigarettes, but only 2.1% (31/1452, 95% CI 1.53.0%) of them declared themselves to be current e-cigarette users, i.e., to have been using e-cigarettes during the month before completing the survey