“…Health systems with stronger primary care have better population health outcomes, and evidence indicates this is likely facilitated by a core set of mechanisms commonly termed "the Four C's": first contact, continuity, comprehensiveness, and coordination. 33 Models of care, or the way in which health services are organized and delivered, are important for realizing these "Four C's". Although there is limited research available, this Brief discusses how patient enrolment models (PEMs) that formally attach patients to a regular source of primary care, patient attachment to team-based models of care, and inter-physician practice variations, have been important determinants of access, continuity, and outcomes throughout the COVID-19 pandemic, with implications for primary care capacity moving forward.…”