Symptoms of COVID-19 | COVID-19 | CDC COVID-19 is caused by infection with a coronavirus named SARS-CoV-2, and flu is caused by infection with one of the influenza viruses You cannot tell the difference between flu and COVID-19 by symptoms alone because some of the symptoms are the same
How to Protect Yourself and Others | COVID-19 | CDC CDC’s Respiratory Virus Guidance provides strategies you can use to help protect yourself and others from health risks caused by COVID-19 and other respiratory viruses
Surveillance and Data Analytics | COVID-19 | CDC This page provides an overview of COVID-19 data and trends over time Other COVID-19 related data visualizations (previously on CDC’s COVID Data Tracker) are provided in the resources section at the bottom of this page
Site Index | COVID-19 | CDC COVID-19 (coronavirus disease 2019) is a disease caused by a virus named SARS-CoV-2 It can be very contagious and spreads quickly
2025–2026 COVID-19 Vaccination Guidance | Covid | CDC The 2025–2026 COVID-19 vaccination schedule is detailed in Table 1 The recommended vaccine and number of 2025–2026 COVID-19 vaccine doses are based on age and vaccination history
Long COVID Signs and Symptoms | Long COVID | CDC Symptoms can last weeks, months, or years after COVID-19 illness and can emerge, persist, resolve, and reemerge over different lengths of time Long COVID may not affect everyone the same way
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