Sudden limb weakness

Is sudden limb weakness worse than usual anywhere?

At or below its usual in every country that reports it.

What is sudden limb weakness?

Sudden floppy weakness of an arm or leg. Doctors check every case for polio, a virus that attacks the nerves and can paralyse within hours.

Signs
Polio may start with fever, tiredness, headache, vomiting, stiff neck and pain in the limbs. About 1 in 200 infections causes lasting paralysis, usually of the legs.
How it spreads
Polio spreads from person to person, mostly through traces of faeces getting into the mouth, and sometimes through dirty water or food.
How to protect yourself
Polio vaccine, given several times, can protect a child for life. There is no cure, so vaccination is the only protection.
Get medical help
Get medical help urgently for any sudden weakness or floppiness in a limb, and straight away if breathing becomes hard.

In Dooram's words, from the World Health Organization. Source: Poliomyelitis (WHO fact sheet), read 8 October 2026. General information, not medical advice.

When does sudden limb weakness usually peak?

  • PakistanAround January: it peaked in December 2024 and February 2025.

What "usual" means.

Sources. Field Epidemiology and Disease Surveillance Division, National Institutes of Health, Islamabad, weekly report.