The Malaysian Health Ministry's director-general, Noor Hisham, announced on Sunday that the disease was diagnosed in a three-month-old baby on Borneo Island.
In case you're wondering, Malaysia's last polio case was reported in 1992, before the country was declared polio-free in 2000. "And when we find a case like Malaysia, it exposes areas that do not have enough vaccine to prevent the spread", he said.
He said the baby is in a stable condition but needs respiratory support. Tests confirmed that he was infected with vaccine-derived poliovirus type 1 (VDPV1). However, it can only be prevented with multiple doses of polio vaccines that have always been proven safe and effective.
"There are still children who have not been vaccinated".
The weakened virus has been excreted from the body through the faeces. However, in unsanitary environments, the virus can infect others who have not been immunised against polio and will thus spread in communities whose polio immunisation rates are less than 95pc.
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Mr Hisham said test results showed that the Malaysian child was infected with a strain that shared genetic links to the virus detected in the Philippines.
He said there were two possibilities how the polio virus, which had been eradicated 27 years ago, could reappear in the country - either the virus came from the Philippines or the infant's family had travelled overseas.
Meanwhile state Health Department director Datuk Dr Christina Rundi said that the baby had not received full vaccination as he only received his first vaccination at the age of two months. "This is a frustrating situation because the circulation of a cVDPV can only end with a polio immunisation".
In recent years, Malaysia has faced a challenge to convince some parents to vaccinate their children.
The specialists have additionally ventured up observing of intense limp loss of motion (AFP) cases, a typical indication of intense polio, he said. He urged members of the public to immediately seek treatment if they have AFP symptoms or to inform the Health Ministry if they know of other cases. IPV vaccination has not been known to cause serious problems, but side effects are a potential risk, says the CDC. "The programme was made even more effective when the vaccine was changed from being administered orally to being administered through injection", he said.
Poliomyelitis, or polio for short, is a highly infectious disease that affects the nervous system and can cause irreversible damage to the spinal cord. Antibodies neutralise and destroy the invading bacteria or virus while memory cells act as reminders to stimulate an immune response if the body is exposed to the same virus again in the future, resulting in the prevention of risky diseases.