Many people have questions about #herdimmunity and #covid19. Northwestern Medicine infectious disease specialist Irfan Hafiz, MD discusses how herd immunity works and whether communities can achieve it without the #covidvaccine.

Dr. Hafiz is chief medical officer at Northwestern Medicine Huntley Hospital, Northwestern Medicine McHenry Hospital and Northwestern Medicine Woodstock Hospital.

https://www.nm.org/about-us/northwestern-medicine-newsroom/nm-news-blog/COVID-19%20Vaccination%20Video%20FAQs