Despite many occurrences of red tide and blue green algae in Florida waters, the understanding of the health effects of exposure to these blooms is limited. Researchers will evaluate short- and long-term health effects of exposure to harmful algal blooms (HABS) in Florida to capture key areas of human exposure and a wide demographic population profile. They also will evaluate the potential effect of exposure to COVID-19 on susceptibility to HABs and health outcomes in this study population.