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  • Coronavirus disease (COVID-19) - World Health Organization (WHO)
    Coronavirus disease (COVID-19) is an infectious disease caused by the SARS-CoV-2 virus Most people infected with the virus will experience mild to moderate respiratory illness and recover without requiring special treatment
  • Coronavirus disease (COVID-19) - World Health Organization (WHO)
    COVID-19 is the disease caused by the SARS-CoV-2 coronavirus It usually spreads between people in close contact COVID-19 vaccines provide strong protection against severe illness and death Although a person can still get COVID-19 after vaccination, they are more likely to have mild or no symptoms
  • Coronavirus Disease (COVID-19) Situation Reports
    The Weekly Epidemiological Update provides an overview of the global, regional and country-level COVID-19 cases and deaths, highlighting key data and trends; as well as other pertinent epidemiological information concerning the COVID-19 pandemic
  • Coronavirus disease (COVID-19) - World Health Organization (WHO)
    COVID-19 is the disease caused by a coronavirus called SARS-CoV-2 WHO first learned of this new virus on 31 December 2019, following a report of a cluster of cases of so-called viral pneumonia in Wuhan, People’s Republic of China
  • COVID-19 epidemiological update – 14 March 2025
    Overview During the four-week reporting period from 6 January to 2 February 2025, weekly SARS-CoV-2 PCR percent test positivity changed from 7 3% in the beginning week of the reporting period to 5 0% in the last week, as detected in integrated sentinel and systematic virological surveillance within the Global Influenza Surveillance and Response System (GISRS)
  • 如何通俗易懂地解释「协方差」与「相关系数」的概念？ - 知乎
    \rho_{YZ}=\frac{Cov(Z,Y)(岁\cdot公斤)}{\sigma_Z(岁)\sigma_Y(公斤)}=\frac{Cov(Z,Y)}{\sigma_Z\sigma_Y}\\ 单位就约掉了，变成没有单位的数了，就可以进行比较了。 比如刚才提到的身高 X ，体重 Y 以及年龄 Z ，假如说根据数据算出来：
  • Risk evaluation for SARS-CoV-2 Variant Under Monitoring: LP. 8. 1
    LP 8 1 is currently one of two SARS-CoV-2 variants under monitoring (VUM) with increasing prevalence globally, the other being XEC Considering the available evidence, the additional public health risk posed by LP 8 1 is evaluated as low at the global level
  • Types of data requested to inform May 2025 COVID-19 vaccine antigen . . .
    The WHO Technical Advisory Group on COVID-19 Vaccine Composition (TAG-CO-VAC) continues to closely monitor the genetic and antigenic evolution of SARS-CoV-2 variants, immune responses to SARS-CoV-2 infection and COVID-19 vaccination, and the performance of COVID-19 vaccines against circulating variants Based on these evaluations, WHO advises vaccine manufacturers and regulatory authorities on
  • Middle East respiratory syndrome coronavirus - Kingdom of Saudi Arabia
    This is the bi-annual update on the Middle East respiratory syndrome coronavirus (MERS-CoV) infections reported to the World Health Organization (WHO) from the Kingdom of Saudi Arabia (KSA) From 6 September 2024 to 28 February 2025, four laboratory-confirmed cases of MERS-CoV infection, including two deaths, were reported to WHO by the Ministry of Health of the KSA One of the four cases was
  • WHO Coronavirus Network (CoViNet)
    The WHO Coronavirus Network (CoViNet) aims to bring together surveillance programs and reference laboratories to support enhanced epidemiological monitoring and laboratory (phenotypic and genotypic) assessment of SARS-CoV-2, MERS-CoV and novel coronaviruses of public health importance





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