The US on Monday recorded its lowest single-day increase of COVID cases since October. ABC News Chief Medical Correspondent Dr. Jennifer Ashton has been covering the pandemic since day one and now she's written a new book to help us all cope. Nightline co-anchor Juju Chang reports. | Nightline

"Short term, yes. Long term, we still don't know," Dr. Ashton says about COVID-19 antibodies preventing future infections. ABC News Chief Medical Correspondent Dr. Jen Ashton answers viewer questions about the virus. https://abcn.ws/2NvHJtG | ABC News Live

"People in black and brown communities and populations are at higher risk for pre-existing conditions...which are also risk factors for severe COVID-19 infection." ABC News Chief Medical Correspondent Dr. Jen Ashton answers questions about COVID-19. https://abcn.ws/31QgnGU | ABC News Live

ABC News Chief Medical Correspondent Dr. Jen Ashton answers viewer questions about COVID-19 and has more on the increase in positive cases in some states, antibodies and more. https://abcn.ws/2YzkNyI | ABC News Live

ABC News Chief Medical Correspondent Dr. Jen Ashton answers viewer questions about COVID-19. https://abcn.ws/2YzkNyI "We've never dealt with this virus before so we don't know how long full recovery can take." | ABC News Live

ABC News Chief Medical Correspondent Dr. Jennifer Ashton shares her top tips for protecting her mental health. https://gma.abc/2ZIjIH5 | Good Morning America

New warning about cell phone use and health risks. Dr. Jennifer Ashton breaks it down for us and gives us some tips about how to reduce exposure to cell phone radiation. | Good Morning America