The latest guidance from the U.S. Centers for Disease Control and Prevention says people who are fully vaccinated should get tested three to five days after a potential exposure, even if they don’t have symptoms. That change comes two months after the agency eased its initial testing guidance. In May, the CDC said vaccinated people face very little risk of serious illness and don’t need to be tested in most cases, even if exposed to someone who was sick. The thinking was that vaccinated people also weren’t likely to spread it to others.
