Why Does Disease Exist?

What viruses have vaccines?

Vaccines, such as the measles, mumps, rubella, chickenpox, and nasal spray flu vaccines contain live, but weakened viruses:Unless a person’s immune system is weakened, it is unlikely that a vaccine will give the person the infection.

These live vaccines may be dangerous to the fetus of a pregnant woman..

Is Lyme disease curable?

If diagnosed in the early stages, Lyme disease can be cured with antibiotics. Without treatment, complications involving the joints, heart, and nervous system can occur. But these symptoms are still treatable and curable.

How your body kills a virus?

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.

Can a virus be a disease?

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 was the last cured disease?

Successfully eradicated diseases. The world has successfuly eradicated two diseases: Smallpox was declared eradicated in 1980.

Why do we get diseases?

Person to person. Infectious diseases commonly spread through the direct transfer of bacteria, viruses or other germs from one person to another. This can happen when an individual with the bacterium or virus touches, kisses, or coughs or sneezes on someone who isn’t infected.

Why do pathogens exist?

Pathogens cause illness to their hosts through a variety of ways. The most obvious means is through direct damage of tissues or cells during replication, generally through the production of toxins, which allows the pathogen to reach new tissues or exit the cells inside which it replicated.

Can diseases cured?

The term “cure” means that, after medical treatment, the patient no longer has that particular condition anymore. Some diseases can be cured. … Medical professionals use medicine, therapy, surgery, and other treatments to help lessen the symptoms and effects of a disease.

What disease was cured by disease?

Medical professionals use medicine, therapy, surgery, and other treatments to help lessen the symptoms and effects of a disease. Sometimes these treatments are cures — in other words, they get rid of the disease. … When a disease can’t be cured, doctors often use treatments to help control it.

How do viruses harm the body?

Viruses are like hijackers. They invade living, normal cells and use those cells to multiply and produce other viruses like themselves. This can kill, damage, or change the cells and make you sick. Different viruses attack certain cells in your body such as your liver, respiratory system, or blood.

How does a disease start?

Infection occurs when viruses, bacteria, or other microbes enter your body and begin to multiply. Disease, which typically happens in a small proportion of infected people, occurs when the cells in your body are damaged as a result of infection, and signs and symptoms of an illness appear.

What diseases do we not have a cure for?

AIDS. Twenty-five years since it was first identified, there is still no cure for Acquired Immune Deficiency Syndrome. AIDS remains among the world’s most potent killers, especially in developing countries. The disease likely started with a chimp to human jump, recent research confirmed.

What disease kills the fastest?

Flesh Eating Bug. This bug can quickly sweep through the body eating the body’s soft tissue. … Cholera. This is an intestinal disease caused by eating contaminated water or food and can kill anyone within hours. … Enterovirus D68. … Bubonic Plague. … Ebola. … Dengue Fever.

What’s the worst illness you can get?

Read on to see the top 10 diseases causing the most deaths worldwide, according to the World Health Organization (WHO) .Chronic obstructive pulmonary disease. … Trachea, bronchus, and lung cancers. … Diabetes mellitus. … Alzheimer’s disease and other dementias. … Dehydration due to diarrheal diseases. … Tuberculosis. … Cirrhosis.More items…

Are viruses alive *?

So were they ever alive? Most biologists say no. Viruses are not made out of cells, they can’t keep themselves in a stable state, they don’t grow, and they can’t make their own energy. Even though they definitely replicate and adapt to their environment, viruses are more like androids than real living organisms.