As thousands of pharmacies get shipments of doses and start vaccinations at their stores this week, the country is taking a significant step toward reaching more Americans. Public health officials and advocates, however, say that won't go far enough in communities where people have been the sickest. More Black and Hispanic Americans have been hospitalized and died from Covid-19. They often face bigger barriers to get vaccine, too: A lack of transportation. A juggle of multiple jobs. Hesitance because of past mistreatment by the medical community. CVS Health and Walgreens will play a bigger role in the effort as a federal program ships doses to more of their stores and those of other retail pharmacies. The expansion represents a business opportunity for the nation's two largest pharmacy chains as they get paid for each vaccine and draw more foot traffic to stores. The vaccine rollout will also test the companies' commitment to expanding health-care access in Black and Hispanic communities.