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Há 13 horas · Subsequently, named severe acute respiratory syndrome coronavirus 2, infections with the virus caused a pandemic with a case fatality rate of around 2% in healthy people under the age of 50, to around 15% in those aged over 80 particularly those with pre-existing comorbidities.
Há 13 horas · COVID-19 pandemic: Chinese authorities first publicly confirm that there is human-to-human transmission of severe acute respiratory syndrome coronavirus 2. 21 January Scientists report that the oldest recognised asteroid impact occurred in Western Australia more than 2.2 billion years ago and that it might have ended the ice age at that time.
Há 13 horas · Fentanyl is a highly potent synthetic piperidine opioid primarily used as an analgesic. It is 20 to 40 times more potent than heroin and 100 times more potent than morphine; [8] its primary clinical utility is in pain management for cancer patients and those recovering from painful surgeries. [9] [10] Fentanyl is also used as a sedative. [11]
Há 13 horas · Influenza vaccines, colloquially known as flu shots, are vaccines that protect against infection by influenza viruses. [13] [14] New versions of the vaccines are developed twice a year, as the influenza virus rapidly changes. [13] While their effectiveness varies from year to year, most provide modest to high protection against influenza.
