Rickettsiae and Chlamydia were once thought to be viruses due to their small size and intracellular lifestyle, but they are actually classified as bacteria. They are both obligate intracellular pathogens that require host cells to multiply.
No, viruses are nonliving.
The Lytic Cycle or by Budding without lysis. See the related questions below for more information.
Viruses that consist of only a nucleocapsid are considered naked viruses. These viruses lack an outer lipid envelope and rely on the nucleocapsid structure for protection and infectivity. Naked viruses tend to be more stable in the environment compared to enveloped viruses.
Emerging viruses
-to isolate and identify viruses in clinical specimens -prepare viruses for vaccines -to research in detail the viral structures, multiplication cycles, genetics, and effects on the host cells
Rickettsiae and Chlamydia were once thought to be viruses due to their small size and intracellular lifestyle, but they are actually classified as bacteria. They are both obligate intracellular pathogens that require host cells to multiply.
Echinacea
Don't ask questions you don't want/require the answer to.
Viruses are considered to be a serious threat to humans because they are very difficult to control. Very few things can control viruses except antivirals.
Viruses combine their genetic material with that of the host cell they have invaded. See the related question below about how viruses reproduce for more information and many related questions.
The Lytic Cycle or by Budding without lysis. See the related questions below for more information.
Viruses are thought to have evolved from ancient cellular organisms, possibly derived from genetic elements that "escaped" from cells. It is believed that viruses originated billions of years ago and have co-evolved with their hosts, adapting to exploit different cellular mechanisms for replication and survival.
Cilia inside the nose filter the air for most dust, allergens, viruses, and bacteria.
Influenzavirus A, Group v virus, Orthomyxoviridae, an RNA virus. Specifically:Order: MononegaviralesFamily: OrthomyxoviridaeGenus/Genera: Influenzavirus ASpecies/Type: Influenza A virusSee the related questions for more details.Orthomyxovididae = influenza viruses
No, colds are caused by viruses and being cold does not cause or worsen a cold. See the related questions.
DVD writes are hardware devices and are not prone to viruses. The software that is used by computers to prepare and send data to the DVD writer can be infected by a virus.