smoking cigarettes while having flu Study shows why cigarette smoke makes flu, other viral infections worse Smokers Flu: Self-Care Tips and

But as science uncovered the harmful health effects linked to tobacco, many Islamic scholars shifted their perspective

make groceries more affordable

While the study did not assess the levels of urine cotinine or carboxyhemoglobin, we selected CO as a biological marker because it is simple and quick to measure, less expensive than a battery of laboratory tests, and noninvasive, making it more agreeable to the subjects as reported by Middleton et al

For all articles, the following data were independently extracted: year of publication, study design, participant sampling, country, number of participants, mean participant age, participant gender, percentage of participants exposed to SHS, SHS measurement, growth measurement, covariates included in the analysis, and the study outcome

10.3389/fendo.2019.00320 41