The reason for starting early is clear: the immune response is strong then and the vaccine is most effective before exposure to the virus.
In the "hierarchy of controls," upstream or source-focussed prevention is the most effective at exposure prevention, and downstream the least [ 12].
Yet there are, to my mind, too many instances of perfectly good, well-made, probably quite expensive ads that fail to work to best effect because nobody seems to be thinking about the most effective level of exposure that they need.
Overall, smoking bans appear most effective in decreasing exposure to SHS in public places.
Emphasis on personal rather than environmental sampling in conjunction with urine or blood sampling is likely to be most effective at classifying exposure.
In 2008, the World Health Organization (WHO) identified six evidence-based tobacco control measures that are the most effective in reducing exposure to cigarette smoking and environmental tobacco smoke [ 6].
In 2007, a revision of the FCTC Article 8 guidelines further recommended that quasi-outdoor and outdoor public places should be smoke-free under some circumstances, and called upon countries to "adopt the most effective protection against exposure wherever the evidence shows that hazard exists" (WHO 2009).
Over the decades of the cold war, one of the most effective Western weapons was exposure of Kremlin distortions of Marxism.
This methodology is regarded as the most effective way of assessing exposure to these chemicals, (i.e., lipophilic, resistant to metabolism, and stored in adipose tissue) (Barr 2008).
In general, smoke-free environmental policies are regarded as the most effective means of reducing exposure to SHS (Task Force on Community Preventive Services 2001).
