Vaccines

An older woman receiving a COVID-19 vaccine from a nurse.

COVID-19 Vaccine: Understanding Herd Immunity, Vaccine Hesitancy

Q&A with Abram L. Wagner

Since the beginning of the pandemic, herd immunity has been portrayed as the holy grail to overcome the COVID-19 pandemic. Abram Wagner, research assistant professor of Epidemiology, explains why reaching herd immunity might not be as simple as we thought, and what vaccine hesitancy and availability have to do with it. Read more

coronavirus testing site

How Coronavirus Variants May Drive Reinfection and Shape Vaccination Efforts

Q&A with Aubree Gordon

Vaccine rollout in the United States has been undeniably slow. And while we wait, worrisome new coronavirus variants are emerging, heightening the urgency to control the pandemic. Some variants, including ones first identified in Brazil, South Africa and the United Kingdom, have mutations that help the coronavirus evade parts of the immune system, raising the specter that some people might face a second round of COVID-19. Read more

person getting vaccinated

Does Getting the Covid-19 Vaccine Stop You Spreading It? Scientists Don't Know Yet.

Arnold Monto featured in the Wall Street Journal

The Covid-19 vaccines authorized in the U.S. are approximately 95% effective at preventing people from getting sick with symptoms, according to Pfizer and Moderna, the companies that produce them. But scientists are still studying whether vaccination prevents transmission to others. Read more