OUR PURPOSE PIONEERING SCIENCE REPORTING 98 BIOGEN 2021 YEAR IN REVIEW PATIENTS OUR PEOPLE ENVIRONMENT COMMUNITY FEATURE Building patient-centered resilience at community health clinics The 2,800 community health clinics across the U.S. responsible for caring for the nation’s most vulnerable patients are unprepared to deal with the increasing number of extreme weather events climate change is creating. To address current climate- related risks to their operations and patient health, Biogen; Americares; and the Center for Climate, Health, and the Global Environment at Harvard T.H. Chan School of Public Health (Harvard Chan C-CHANGE) teamed up to tackle the issue. Together, the organizations are creating a first-of-its-kind Climate Resilient Health Clinics Toolkit that will help clinics use available resources to better manage patient care when facing increasingly common climate health effects. A toolkit module on extreme heat has already been rolled out to pilot clinics. Modules on wildfires and hurricanes will follow later this year. Over the next five years, the project aims to reach 150 clinics that provide free or low-cost healthcare – such as primary, behavioral, emergency, maternity and specialty care – to uninsured or underinsured patients in the U.S. “This work is foundationally about health equity,” says Dr. Aaron Bernstein, Interim Director of Harvard Chan C-CHANGE. “If we can find the means to safeguard the most vulnerable in our country, then we can surely do so for those who are better off.” Avicenna Free Clinic in Panama City, Florida, suffered major damage from Hurricane Michael in 2018. Photo used with permission from Avicenna Free Clinic. Advancing purpose and serving humanity through corporate giving Reflecting our purpose and values, Biogen serves humanity by supporting communities around the world. We care deeply about creating a healthier, more equitable world by assisting our neighbors in need and engaging the next generation in science, a commitment that spans the globe. Each year, Biogen commits significant financial support through a variety of corporate giving initiatives that positively impact the communities where we live and work. Through our corporate giving efforts in 2021, we contributed $71 million to help serve humanity worldwide. Grants Our grants are financial commitments to time-limited projects or programs with identified objectives without tangible benefit to Biogen in return. In 2021, we contributed $14 million in grants to support independent medical educational activities for healthcare providers and researchers, educational activities for patients or caregivers, fellowships, infrastructure upgrades for healthcare organizations or institutions, and other endeavors. Sponsorships In 2021, we provided $57 million in contributions to eligible organizations in connection with specific events or initiatives. Our sponsorship commitments included organizations such as the International Society for Environmental Epidemiology, American Academy of Neurology Institute, and the National Minority Quality Forum, among many others.

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