Early during the COVID-19 pandemic, marked declines in patients presenting with acute cardiovascular conditions were observed, 1,2 whereas mortality attributed to cardiovascular causes increased. 3 This raised concerns that patient reluctance to seek emergency care contributed to preventable complications and excess deaths, and public health campaigns sought to reassure patients that hospitals were safe and to encourage seeking care when needed. As COVID-19 resurged in late 2020, rates of infections, hospitalizations, and deaths exceeded those of previous surges. Many countries reimplemented lockdowns, and recent UK data indicate that presentations for emergent cardiovascular conditions again declined. 4 We evaluated changes in rates of acute myocardial infarction (AMI) hospitalizations and suspected ischemic stroke as measures of patient willingness to seek emergency care during the most recent COVID-19 surges in the US.Methods | We examined data from Kaiser Permanente Northern California (KPNC), a large, integrated health care delivery system with 21 medical centers and 255 clinics, providing comprehensive care for more than 4.5 million persons throughout Northern California. Its membership is highly representative of the local and statewide population regarding age, sex, race and ethnicity, and socioeconomic status. 5 We examined weekly incidence rates for adult members hospitalized for AMI or suspected acute ischemic stroke (ie, "stroke alerts") who presented to KPNC facilities from January 22, 2019, to January 18, 2021. Acute MI was identified with a combination of discharge diagnosis codes and positive values of serum cardiac troponin I. 1 Stroke alerts are tracked through a comprehensive stroke program at 21 Joint Commission stroke-certified KPNC facilities that includes immediate consultation by neurologists for evaluation and treatment for all suspected ischemic strokes. 2,6 We excluded patients younger than 18 years, with unknown sex, or with lack of active health plan membership in each weekly cohort.Weekly incidence rates of events per 100 000 personweeks and 95% CIs for AMI and stroke alerts during COVID-19 periods (