reporter denise didor from our station in los angeles. >> reporter: polls show, particularly high amonglack and latino communities, where many are being infected and dying at disproportionately high rates. >> this hesitation, this uncertainty, is understandable, given our legacy. it's not just tuskegee. there is a tradition here and it makes the african-american community leery. >> reporter: president of medicine and science, spearheads policies for eliminating health disparities. >> when you look at making a change and you look at deflecting the trajectory of the pandemic. these are certainly communities that one would want to focus on from a public-health perspective. >> experts agree, more needs to be done to engage those in minority populations. but we need to hurry. >> i would say this is an opportunity for us to reverse this legacy, and focus on these communities, primarily. >> reporter: abc 7 news. >> a poe ten tential answer, to to what's been causing the mysterious die-off of salmon. washington researchers say they're dying from micro plastics from tires that get washed into st