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Johns Hopkins experts in global public health, infectious disease, and emergency preparedness have been at the forefront of the international response to COVID-19. This website is a resource to help advance the understanding of the virus, inform the public, and brief policymakers in order to guide a response, improve care, and save lives.
- Tracking
Tracking Covid. Explore critical data. Examine the pandemic...
- Johns Hopkins Coronavirus Resource Center
The Johns Hopkins Coronavirus Resource Center established a...
- Tracking
Tracking Covid. Explore critical data. Examine the pandemic through a variety of demographic lenses: age, race, ethnicity, and gender. U.S. State Data Availability. Which states have released breakdowns of Covid-19 data by race? Visual representations of released state data. Reporting Frequencies. State Reporting Frequencies.
The Johns Hopkins Coronavirus Resource Center established a new standard for infectious disease tracking by publicly providing pandemic data in near real time. It began Jan. 22, 2020 as the COVID-19 Dashboard, operated by the Center for Systems Science and Engineering and the Applied Physics Laboratory.
- How Does The Coronavirus Spread?
- How Did The Coronavirus Start?
- What Is The Incubation Period For Covid-19?
As of now, researchers know that the coronavirus is spread through droplets and virus particles released into the air when an infected person breathes, talks, laughs, sings, coughs or sneezes. Larger droplets may fall to the ground in a few seconds, but tiny infectious particles can linger in the air and accumulate in indoor places, especially wher...
The first case of COVID-19 was reported Dec. 1, 2019, and the cause was a then-new coronavirus later named SARS-CoV-2. SARS-CoV-2 may have originated in an animal and changed (mutated) so it could cause illness in humans. In the past, several infectious disease outbreaks have been traced to viruses originating in birds, pigs, bats and other animals...
Symptoms show up in people within two to 14 days of exposure to the virus. A person infected with the coronavirus is contagious to others for up to two days before symptoms appear, and they remain contagious to others for 10 to 20 days, depending upon their immune system and the severity of their illness.
Johns Hopkins Medicine continues to follow the highest level of safety precautions as we care for our patients and work with our communities during the coronavirus pandemic. Please use this site to learn more about patient care, testing, vaccinations and additional information about COVID-19.
The COVID-19 vaccine lessens the severity of COVID-19 by teaching the immune system to recognize and fight the virus that causes the disease. For fall/winter 2023–2024, the updated COVID-19 vaccine is based on the XBB.1.5 variant. The updated vaccine is made by Pfizer-BioNTech, Moderna and Novavax.
We are tracking the COVID-19 spread in real-time on our interactive dashboard with data available for download. We are also modeling the spread of the virus. Preliminary study results are discussed on our blog.
