In the three years since Covid-19 surfaced in the U.S., most Americans have been infected and are largely back to their prepandemic routines and workaday lives.
Scientists, still in the dark about what the virus will do in the long term, warn it is too early to sound the all clear. Despite the success of a global effort to decode the SARS-CoV-2 virus and create vaccines and treatments to combat it, there remains uncertainty about how the virus will behave, the path of its mutations and Covid-19’s long-term effects.
