- What is the most common virus in humans?
- What is the most common virus in the world?
- What are 3 diseases caused by viruses?
- What are 5 ways diseases are transmitted?
- Which diseases are not caused by virus?
- How does the body kill viruses?
- How do viruses multiply?
- What are the symptoms of a viral infection?
- What two methods are used to control viral diseases?
- What are some examples of viral diseases?
- What was the deadliest pandemic in history?
- Are viruses living?
- How long are viruses contagious?
- What is the deadliest disease in history?
What is the most common virus in humans?
The most common type of viral disease is the common cold, which is caused by a viral infection of the upper respiratory tract (nose and throat).
Other common viral diseases include: Chickenpox.
What is the most common virus in the world?
Hepatitis B: Approximately 2 billion people are infected with the hepatitis B virus (HBV), making it the most common infectious disease in the world today.
What are 3 diseases caused by viruses?
Viruses cause familiar infectious diseases such as the common cold, flu and warts. They also cause severe illnesses such as HIV/AIDS, smallpox, and Ebola. Viruses are like hijackers. They invade living, normal cells and use those cells to multiply and produce other viruses like themselves.
What are 5 ways diseases are transmitted?
Diseases Spread. Infectious diseases can spread in a variety of ways: through the air, from direct or indirect contact with another person, soiled objects, skin or mucous membrane, saliva, urine, blood and body secretions, through sexual contact, and through contaminated food and water.
Which diseases are not caused by virus?
Which Of The Following Diseases Is Not Caused By Virus 1 Mumps 2 Aids 3 Tuberculosis 4 Rabies.
How does the body kill viruses?
Viruses make us sick by killing cells or disrupting cell function. Our bodies often respond with fever (heat inactivates many viruses), the secretion of a chemical called interferon (which blocks viruses from reproducing), or by marshaling the immune system’s antibodies and other cells to target the invader.
How do viruses multiply?
For viruses to multiply, they usually need the support of the cells they infect. In many cases, only in their host’s nucleus can they find the machines, enzymes and building blocks with which they can multiply their genetic material before infecting other cells. But not all viruses find their way into the cell nucleus.
What are the symptoms of a viral infection?
The signs and symptoms of a viral infection depend on what virus you have and how it affects your body. Here are a few examples: Influenza: Fever….Stiff neck.Headache.Fever.Nausea and vomiting.Rash.Sensitivity to light (photophobia)Confusion.
What two methods are used to control viral diseases?
While we do have limited numbers of effective antiviral drugs, such as those used to treat HIV and influenza, the primary method of controlling viral disease is by vaccination, which is intended to prevent outbreaks by building immunity to a virus or virus family.
What are some examples of viral diseases?
Examples of exanthematous viral diseases include:measles.rubella.chickenpox/shingles.roseola.smallpox.fifth disease.chikungunya virus infection.
What was the deadliest pandemic in history?
In 1918, a strain of influenza known as Spanish flu caused a global pandemic, spreading rapidly and killing indiscriminately. Young, old, sick and otherwise-healthy people all became infected, and at least 10% of patients died.
Are viruses living?
Viruses are not living things. Viruses are complicated assemblies of molecules, including proteins, nucleic acids, lipids, and carbohydrates, but on their own they can do nothing until they enter a living cell. Without cells, viruses would not be able to multiply. Therefore, viruses are not living things.
How long are viruses contagious?
For colds, most individuals become contagious about a day before cold symptoms develop and remain contagious for about five to seven days. Some children may pass the flu viruses for longer than seven days (occasionally for two weeks). Colds are considered upper respiratory infections.
What is the deadliest disease in history?
Cholera, bubonic plague, smallpox, and influenza are some of the most brutal killers in human history. And outbreaks of these diseases across international borders, are properly defined as pandemic, especially smallpox, which throughout history, has killed between 300-500 million people in its 12,000 year existence.