Tan C, BCIT School of Health Sciences, Environmental Health, Chen D, Dix-Cooper L, McIntyre L. Did anyone get sick this weekend? determining the effectiveness of using social media posts for public health surveillance. ephj [Internet]. 2019 Apr. 10 [cited 2024 Nov. 21];. Available from: https://journals.bcit.ca/index.php/ehj/article/view/40