The impact of cancer campaigns in Brazil: a Google Trends analysis.

It is estimated that more than 600,000 new cases of cancer will be reported in Brazil during the 2018-2019 biennium, especially with regard to prostate, breast, lung and colorectal cancers. Due to the high prevalence, incidence and mortality rates of these diseases, cancer campaigns such as 'Pink October' and 'Blue November' were strongly promoted in the past decade throughout the country to raise awareness of breast and prostate cancer, respectively. Nevertheless, whether the implementation of these campaigns has been proven efficient is still unknown.