COVID-19 vaccine data shows that the shot is effective at staving off the serious outcomes of the virus, including hospitalization and death. However, researchers are still unsure whether or not the vaccine will lessen the chance of patients developing chronic, long-term symptoms. The Verge interviewed Timothy Henrich, virologist and viral immunologist at the University of California, San Francisco on the matter. Henrich, who studies the long-term effects of COVID-19, believes this is an important question around the vaccine that needs to be answered. While the vaccine may allow individuals to get more mild cases of COVID-19, it’s still not known whether it will prevent them from turning into “long-haulers.”