The study of the progenitor virus of the progenitor virus

Ivanovsky was the first person in the world to discover the virus and is hailed as the "father of virology".

In the 19th century, Ivanovsky (1864-1920) speculated that the disease was caused by bacteria when studying the disease of tobacco mosaic. He squeezed the juice out of tobacco with mosaic disease, filtered it with a filter that could filter out bacteria, and then used the filtered juice to infect normal tobacco leaves, and found that normal tobacco leaves could still be diseased. This suggests that tobacco mosaic disease is caused by a pathogen smaller than bacteria, which he called "filtering virus".

Later, scientists Leffler (1852-1915) and Frozch (when studying foot-and-mouth disease in animals) proved that foot-and-mouth disease was also caused by "filtering viruses". In other words, Ivanovsky was the first person in the world to discover the virus and was hailed as the "father of virology" by later generations.

Summary. Dear, I'm honored to have your question The answer that Mr. Lin found for you here is: the pathogenic virus in the general human body may come from animals or its own latent virus.

The structure of the virus is simple, it contains only one nucleic acid, and it must be parasitic in living cells, and the viruses that generally cause diseases in the human body are mostly from animals or viruses latent by themselves. 1.Animals:

Some animal viruses are common to humans and animals, and animals carry the virus to transmit, such as mosquitoes will carry West Nile virus, which is transmitted by biting humans, and West Nile virus disease will occur in humans after being infected with the virus. 2.Self-latent virus:

Some viruses can be latent in the human body after infection, and when the body's immune function is low, clinical manifestations will appear, the more common ones are herpes viruses, chickenpox virus, herpes simplex virus, cytomegalovirus, Epstein-Barr virus, etc. <>

Dear, I'm honored to have your question The answer that Mr. Lin found for you here is: the pathogenic virus in the general human body may come from animals or its own latent virus. The structure of the virus is simple, it contains only one nucleic acid, and it must be parasitic in living cells, and the viruses that generally cause diseases in the human body are mostly from animals or viruses latent by themselves.

1.Animals: Some animal viruses are common viruses of Li Suiyun and animals, and animals carry the Clan Wood virus and transmit it, such as mosquitoes will carry West Nile virus, which is transmitted by biting humans, and the human body will develop West Nile virus disease after being infected with the virus.

2.Autolatent virus: Some viruses can be latent in the human body after infection, and clinical manifestations will appear when the body's immune function is low, such as herpes virus, varicella virus, herpes simplex virus, cytomegalovirus, Epstein-Barr virus, etc.

Viruses may resemble the most primitive forms of life, viruses may be products of host cells, and the status of viruses in the evolution of biological slag is uncertain, but, regardless of the origin of their original limbs, once viruses are created, they can evolve through mutation and natural selection, just like other organisms.

Originating from the Ancestral Virus, it is the origin of all viruses in the Resident Evil series and plays a decisive role in the Resident Evil series of stories. The Progenitor virus was first mentioned in the Resident Evil: Codename Veronica document, "The Director's Notes".

Later, in the document "Marcus's Diary" in "Resident Evil 0", the relationship between the Ancestral Virus and the classic virus of the Resident Evil series, the T-virus, was established. In "Resident Evil 5", the relevant backstory and specific circumstances of the Ancestral Virus were revealed.

The origin of the virus.

There have been various speculations about the origin of the virus; One view is that viruses may resemble the most primitive of life; Another is that viruses may have degenerated from bacteria and gradually lost the ability to live independently due to the high development of parasitism, such as saprophytes, parasites, intracellular parasites, mycoplasma, rickettsia, chlamydia, macroviruses, and microviruses; Others believe that the virus may be a product of the host cell. Each of these speculations has some basis and is currently inconclusive. Therefore, the place of viruses in biological evolution is undecided.

However, regardless of their original origins, viruses, once created, can evolve through mutation and natural selection, just like other organisms.

The questions are novel and exploratory. The virus does not have cells, but it must parasitize in living cells.