New CDC Role and Fall 2021 Update

Dear colleagues, alumni and friends, As fall begins, I’m writing to share some exciting news and an update on our activities at the Center for Communicable Disease Dynamics (CCDD). While remaining the Director of CCDD, I have begun a new, yearlong role as Director of Science for the Center for Forecasting and Outbreak Analytics at CDC. This new center was called for in President Biden’s National Security Memo #1 and…

New Year’s Letter from Dr. Marc Lipsitch, CCDD Director

Dear colleagues, alumni, and friends, As we start the new year, it is a privilege to write to you with some reflections on 2020, a year like no other, and to offer some perspective on the year ahead. I lead the Center for Communicable Disease Dynamics at the Harvard Chan School. Our group consists of me, Drs. Caroline Buckee, Bill Hanage and Michael Mina, about 15 postdocs and 15 PhD…

COVID-19 Vaccines and Herd Immunity

By Marc Lipsitch How many people in a population will need to get a COVID-19 vaccine before herd immunity is achieved? This question has been all over the news lately, with speculations of 70%, 80%, or other numbers. The math needed to answer this question is simple, but the question is, in my opinion, unanswerable at this point because the inputs to the math — the numbers to plug into…

Join us for a talk by Dr. Gili Regev-Yochay of Sheba Medical Center

Join us for a discussion by Dr. Gili Regev-Yochay, MD, MS in partnership with the Department of Epidemiology’s Center for Communicable Disease Dynamics. Dr. Gili Regev-Yochay is a visiting researcher collaborating with Marc Lipsitch, Professor of Epidemiology and the Director of CCDD. She is the Director of the Infection Prevention and Control Unit at Sheba Medical Center in Ramat-Gan, Israel. Event will take place on Tuesday, January 14th from 11:30-1PM…