What did smallpox come from?

What did smallpox come from?

Smallpox is thought to have originated in India or Egypt at least 3,000 years ago. The earliest evidence for the disease comes from the Egyptian Pharaoh Ramses V, who died in 1157 B.C. His mummified remains show telltale pockmarks on his skin.

Is smallpox a DNA enveloped virus?

Poxviruses are large, brick to ovoid-shaped enveloped DNA viruses. Four members of the pox virus family belonging to the Orthopoxvirus and Yatapoxvirus genera can cause disease in nonhuman primates.

Is pox virus a DNA virus?

Poxviruses are brick or oval-shaped viruses with large double-stranded DNA genomes. Poxviruses exist throughout the world and cause disease in humans and many other types of animals.

What is DNA virus and RNA virus?

DNA viruses contain usually double‐stranded DNA (dsDNA) and rarely single‐stranded DNA (ssDNA). These viruses replicate using DNA‐dependent DNA polymerase. RNA viruses have typically ssRNA, but may also contain dsRNA.

Are there DNA viruses?

DNA viruses have DNA genomes that are replicated by either host or virally encoded DNA polymerases. There is considerable diversity among DNA virus genomes and the relative stability of DNA allows for genomes much larger than possible for RNA viruses.

Which is the smallest virus in the world?

For the first time – scientists have detected one of the smallest known viruses, known as MS2. They can even measure its size – about 27 nanometers. For comparison’s sake, about four thousand MS2 viruses lined side-by-side are equal to the width of an average strand of human hair.

Is chickenpox a pox virus?

Chickenpox is a highly contagious disease caused by the varicella-zoster virus (VZV). It can cause an itchy, blister-like rash. The rash first appears on the chest, back, and face, and then spreads over the entire body, causing between 250 and 500 itchy blisters.