Silent spreaders and long haulers. Aerosols and protocols. 10 things science has learned about COVID

It’s been only nine months since the world learned of a new coronavirus that would trigger a pandemic declaration in March and ultimately disrupt billions of lives. That’s little more than a blink of the eye when it comes to understanding a novel disease, and the advice from scientists and doctors is still evolving as they accumulate experience with COVID-19. “People seem to think that we would have all the information on it right away,” said Northwestern University professor Aaron Packman, an environmental engineer who specializes in surveillance of wastewater and buildings to detect disease-causing germs. “What most people don’t appreciate is when you have a new disease a new infectious disease, a new pathogen historically it’s taken years to get all the information you need to fully deal with it. This is all accelerated, a lot.” Here are a few things that science has learned so far about the SARS-CoV-2 coronavirus and the disease it causes.