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A PNAS report in September 2020 confirmed that the virus is much more dangerous for the elderly than the young, noting that about 70% of all U.S. COVID-19 deaths had occurred to those over the age of 70. [94] As of early August 2020, among the 45 countries that had over 50,000 cases, the U.S. had the eighth highest number of deaths per-capita.
Weekly confirmed COVID-19 deaths Map of cumulative COVID-19 death rates by U.S. state [8] On December 31, 2019, China announced the discovery of a cluster of pneumonia cases in Wuhan. The first American case was reported on January 20, [9] and Health and Human Services Secretary Alex Azar declared a public health emergency on January 31. [10]
An epidemic curve, also known as an epi curve or epidemiological curve, is a statistical chart used in epidemiology to visualise the onset of a disease outbreak.It can help with the identification of the mode of transmission of the disease.
As of 3 February 2025, 115 countries and territories have at least 200,000 confirmed COVID-19 cases, and of them, 90 (18 out of 23 or nearly 78.3%) have at least half a million confirmed COVID-19 cases, incl. Egypt and Hungary. On 11 March 2022, the second anniversary of the day when the COVID-19 outbreak became a pandemic was commemorated.
Daily non-repatriated COVID-19 cases in the US by state (January 1, 2023 – May 12, 2023) Date West Midwest South Northeast Territories Date Confirmed Deaths AK AZ CA CO HI ID MT NM NV OR UT WA WY IA IL IN KS MI MN MO ND NE OH OK SD WI AL AR FL GA KY LA MS NC SC TN TX VA WV CT DC DE MA MD ME NH NJ NY PA RI VT GU MP PR VI Daily Total Daily ...
A COVID-19 vaccine is intended to provide acquired immunity against severe acute respiratory syndrome coronavirus 2 (SARS‑CoV‑2), the virus that causes coronavirus disease 2019 . Prior to the COVID-19 pandemic, an established body of knowledge existed about the structure and function of coronaviruses causing diseases like severe acute ...
On 11 April 2020, the United States became the country in North America with the highest official death toll for COVID-19, at over 20,000 deaths. [4] As of 10 April 2022, there are about 97 million cases and about 1.4 million deaths in North America; about 88.9 million have recovered from COVID-19, meaning that nearly 11 out of 12 cases have ...
Coronavirus disease 2019 (COVID-19) is a contagious disease caused by the coronavirus SARS-CoV-2. In January 2020, the disease spread worldwide, resulting in the COVID-19 pandemic . The symptoms of COVID‑19 can vary but often include fever, [ 7 ] fatigue, cough, breathing difficulties , loss of smell , and loss of taste .