is it ok to smoke 4 cigarettes a day No Safe Level of Smoking ❌ “Just 1–2 a day”

Microbiota changes induced by CS exposure, independent of structural lung damage, exacerbated influenza outcomes, highlighting the role of microbial dysbiosis in respiratory disease progression [90]

van der Plas A, Antunes M, Pouly S, de La Bourdonnaye G, Hankins M, Heremans A

References Abbing-Karahagopian, V, Huerta, C, Souverein, PC, de Abajo, F, Leufkens, HGM, Slattery, J, Alvarez, Y, Miret, M, Gil, M, Oliva, B, Hesse, U, Requena, G, de Vries, F, Rottenkolber, M, Schmiedl, S, Reynolds, R, Schlienger, RG, de Groot, MCH, Klungel, OH, van Staa, TP, van Dijk, L, Egberts, AC, Gardarsdottir, H and De Bruin, ML (2014) Antidepressant prescribing in five European countries: application of common definitions to assess the prevalence, clinical observations, and methodological implications

If it comes with a poor packaging, for example, your e-cig is casually put together in a box, then it is likely a fake e-cig