Polio is caused by

What Is Polio? Polio is short for "poliomyelitis." It's a virus that spreads easily between people who aren't vaccinated. In its most severe form, it can attack your spinal cord and People of any age can get Polio Symptoms Most people who catch the poliovirus don't have symptoms. About 1 in 4 people will have symptoms that look a lot like • • Feeling • • • • Back or • Muscle weakness • • Vomiting "Nonparalytic polio" symptoms like these often don't cause you to become paralyzed. They usually go away on their own within 10 days. A smaller number of people have a more severe kind of polio that's called "paralytic polio." If you have it, your symptoms will start off like the mild ones above. Within a week, you'll also start to have: • A loss of reflexes • Severe • Floppy limbs • A feeling of pins and needles in your legs • Paralyzed arms, legs, or both • Polio can be life-threatening if the muscles you use to Years after you have polio, you may start to have other symptoms. Known as "post-polio syndrome," you could have: • Problems with breathing and swallowing • Muscle loss • • Trouble handling low temperatures Polio is different from Polio Causes and Risk Factors You get polio from a virus. You have to come in direct contact with the virus to get it. This can be person-to-person contact, or through contact with an object that has the virus on it. When you have the virus, it lives in your throat and Transmission The virus gets inside you through your • Contact with feces fro...

Poliomyelitis (polio) is a highly infectious viral disease that largely affects children under 5 years of age. The virus is transmitted by person-to-person spread mainly through the faecal-oral route or, less frequently, by a common vehicle (e.g. contaminated water or food) and multiplies in the intestine, from where it can invade the nervous system and cause paralysis. In 1988, the World Health Assembly adopted a resolution for the worldwide eradication of polio, marking the launch of the Wild poliovirus cases have decreased by over 99% since 1988, from an estimated 350 000 cases in more than 125 endemic countries to 6 reported cases in 2021.Of the 3 strains of wild poliovirus (type 1, type 2 and type 3), wild poliovirus type 2 was eradicated in 1999 and wild poliovirus type 3 was eradicated in 2020.As at 2022, endemic wild poliovirus type 1 remains in two countries: Pakistan and Afghanistan. Poliovirus is highly infectious. The incubation period is usually 7–10 days but can range from 4–35 days. The virus enters the body through the mouth and multiplies in the intestine. It then invades the nervous system. Up to 90% of those infected experience no or mild symptoms and the disease usually goes unrecognized. In others, initial symptoms include fever, fatigue, headache, vomiting, stiffness in the neck, and pain in the limbs. These symptoms usually last for 2–10 days and most recovery is complete in almost all cases. However, in the remaining proportion of cases the virus ca...

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What is polio? Polio (also known as poliomyelitis) is a highly contagious disease caused by a virus that attacks the nervous system. Children younger than 5 years old are more likely to contract the virus than any other group. According to the World Health Organization (WHO), 1 in 200 polio infections will result in permanent • Americas • Europe • Western Pacific • Southeast Asia The polio vaccine was developed in 1953 and made available in 1957. Since then cases of polio have dropped in United States. It’s estimated that 95 to 99 percent of people who contract poliovirus are asymptomatic. This is known as subclinical polio. Even without symptoms, people infected with poliovirus can still spread the virus and cause infection in others. Non-paralytic polio Signs and symptoms of non-paralytic polio can last from one to 10 days. These signs and symptoms can be flu-like and can include: • • • • • • Non-paralytic polio is also known as abortive polio. Paralytic polio About 1 percent of polio cases can develop into paralytic polio. Paralytic polio leads to paralysis in the Initial symptoms are similar to non-paralytic polio. But after a week, more severe symptoms will appear. These symptoms include: • loss of reflexes • severe spasms and muscle pain • loose and floppy limbs, sometimes on just one side of the body • sudden paralysis, temporary or permanent • deformed limbs, especially the hips, ankles, and feet It’s rare for full paralysis to develop. Post-polio syndrome It’s pos...

Overview Post-polio syndrome is a group of potentially disabling signs and symptoms that appear decades after the initial polio illness. These signs and symptoms usually appear between 30 to 40 years after having polio. Infection from the polio virus once caused paralysis and death. However, the introduction of the inactivated polio vaccine in the 1950s greatly reduced polio's spread. Symptoms Post-polio syndrome only affects people who had polio. Common signs and symptoms of post-polio syndrome include: • Muscle and joint weakness and pain that gets worse over time • Feeling easily fatigued and exhausted • Losing muscle tissue (atrophy) • Breathing or swallowing problems • Sleep-related breathing disorders, such as sleep apnea • Decreased tolerance of cold temperatures Post-polio syndrome progresses slowly in most people. They may experience new signs and symptoms followed by periods of stability. When to see a doctor See your doctor if you have increasing weakness or fatigue. It's important to rule out other causes of your signs and symptoms and determine whether you have post-polio syndrome. Nerve cell (neuron) The basic unit of communication in the nervous system is the nerve cell (neuron). Each nerve cell consists of the cell body, which includes the nucleus, a major branching fiber (axon) and numerous smaller branching fibers (dendrites). The myelin sheath is fatty material that covers, insulates and protects nerves of the brain and spinal cord. There are several the...