WebApr 7, 2009 · Smallpox is an infectious disease caused by the variola virus. It is characterized by fever, a general feeling of ill health (malaise), headaches and back pain. These initial symptoms are followed by a rash and small, raised bumps or lesions (pocks) within two or three days. WebFeb 26, 2014 · Smallpox is a highly contagious and deadly disease caused by the variola virus. It was estimated to have infected 300 million people in the 20th Century before it became the only human infectious disease ever …
What Is Smallpox? Symptoms, Causes, Diagnosis, Treatment, and ...
Web(a) Rabies virus has a single-stranded RNA (ssRNA) core and an enveloped helical capsid, whereas (b) variola virus, the causative agent of smallpox, has a double-stranded DNA (dsDNA) core and a complex capsid. Rabies transmission occurs when saliva from an infected mammal enters a wound. WebSmallpox is a highly contagious disease caused by the smallpox virus, an orthopoxvirus. Case fatality rate is about 30%. Natural infection has been eradicated. The main concern … high definition quality
Infection: Bacterial or viral? - Mayo Clinic
WebApr 9, 2024 · Viruses are usually much smaller than bacteria with the vast majority being submicroscopic. While most viruses range in size from 5 to 300 nanometers (nm) , in recent years a number of giant viruses, including Mimiviruses and Pandoraviruses with a diameter of 0.4 micrometers (µm) , have been identified. For a comparison of the size of a virus ... WebJun 11, 2024 · The viruses are infectious by different means: variola is infectious via direct droplets, say for example when a patient sneezes, or through contamination by pus from the smallpox lesions. Polio is transmitted fecal-orally. It can get into water systems so it’s much easier to transmit than smallpox and has the potential to be much more widespread. WebJun 28, 2016 · Smallpox is an ancient disease caused by the variola virus. Early symptoms include high fever and fatigue. The virus then produces a characteristic rash, particularly … how fast does alpha radiation travel