Diseases, Conditions, Syndromes

Will summer slow the spread of COVID-19? New research sheds light

At face value, it seems highly plausible that SARS-CoV-2—the virus that causes COVID-19—could behave seasonally, being more prevalent in winter and less so in summer. The four other coronaviruses that commonly circulate ...

Diseases, Conditions, Syndromes

Children less infectious than adults with SARS-CoV-2

Children may not be as infectious in spreading SARS-CoV-2 to others as previously thought, according to new University of Manitoba-led research in CMAJ (Canadian Medical Association Journal).

Diseases, Conditions, Syndromes

Blood type not associated with COVID-19 outcomes

(HealthDay)—Blood type is not associated with COVID-19 susceptibility or outcomes, according to a research letter published online April 5 in JAMA Network Open.

Diseases, Conditions, Syndromes

Interleukin-33 involved in immunity to SARS-CoV-2

Early in the pandemic, a team of immunologists from the Max Planck Institute of Immunobiology and Epigenetics in Freiburg and physicians from the University of Freiburg Medical Center joined forces to learn more about immunity ...

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Severe acute respiratory syndrome

Severe Acute Respiratory Syndrome (SARS; pronounced /sɑrz/, sarz) is a respiratory disease in humans which is caused by the SARS coronavirus (SARS-CoV). There has been one near pandemic to date, between the months of November 2002 and July 2003, with 8,096 known infected cases and 774 deaths (a case-fatality rate of 9.6%) worldwide being listed in the World Health Organization's (WHO) 21 April 2004 concluding report. Within a matter of weeks in early 2003, SARS spread from the Guangdong province of China to rapidly infect individuals in some 37 countries around the world.

Mortality by age group as of 8 May 2003 is below 1% for people aged 24 or younger, 6% for those 25 to 44, 15% in those 45 to 64 and more than 50% for those over 65. For comparison, the case fatality rate for influenza is usually around 0.6% (primarily among the elderly) but can rise as high as 33% in locally severe epidemics of new strains. The mortality rate of the primary viral pneumonia form is about 70%.

As of May 2006[update], the spread of SARS has been fully contained thanks to the efforts of the WHO, with the last infected human case seen in June 2003 (disregarding a laboratory induced infection case in 2004). However, SARS is not claimed to have been eradicated (unlike smallpox), as it may still be present in its natural host reservoirs (animal populations) and may potentially return into the human population in the future.

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