File:Modified smallpox1.png

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Modified smallpox.

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English: Modified smallpox resembling chickenpox in a 4 year old vaccinated person.

Date

1962

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https://phil.cdc.gov/Details.aspx?pid=10418

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Dr.Robinson

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This media comes from the Centers for Disease Control and Prevention's Public Health Image Library (PHIL), with identification number #10418.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	22:03, 10 November 2021		1,176 × 1,804 (2.67 MB)	Aeschylus (talk \| contribs)	Uploaded a work by Dr.Robinson from https://phil.cdc.gov/Details.aspx?pid=10418 with UploadWizard

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PNG file comment	1962 Dr. Robinson This 4 year-old Cardiff, Wales, smallpox patient presented with what was characterized as a modified variola major rash, which resembled varicella. There was a cropping of the lesions in their distribution pattern. The patient was felt to have been inoculated by way of a laparotomy wound, as well as possibly through having received a blood transfusion. See PHIL 10417 for another view of this child's face depicting the distribution of papules in this region.<p>Where does Smallpox comes from?<p></b>Smallpox is caused by the variola virus that emerged in human populations thousands of years ago. Except for laboratory stockpiles, the variola virus has been eliminated. However, in the aftermath of the events of September and October, 2001, there is heightened concern that the variola virus might be used as an agent of bioterrorism. For this reason, the U.S. government is taking precautions for dealing with a smallpox outbreak.<b> <b>Transmission:</b><p>Natural infection occurs following implantation of the virus on the otolaryngeal or respiratory mucosa. The infectious dose is unknown but believed to be only a few virions.<p>Smallpox spreads from person to person primarily by droplet nuclei or aerosols expelled from the oropharynx of infected persons and by direct contact. Contaminated clothing or bed linens can also spread the virus. There are no known animal or insect vectors.<p>The risk for transmission does not occur until the onset of rash, following a period of high fever and malaise. Secondary cases are most often seen in those immediately caring for the patient, who is most infectious from the onset of the rash through the first 7 to 10 days of the rash. As scabs form, the risk of infecting others rapidly wanes. Even though scabs contain large amounts of viable virus, it appears not to be especially infectious, presumably because the virions are tightly bound in the fibrin matrix.
Horizontal resolution	118.11 dpc
Vertical resolution	118.11 dpc

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