Flu

Very common

A disease caused by virus infecting the respiratory tract.

Symptoms may include:

• Muscle weakness
• Headache
• Runny nose

Stroke

Common

Occurs when the supply of blood to the brain is reduced or blocked completely, which prevents brain tissue from getting oxygen and nutrients.

Symptoms may include:

• Muscle weakness
• Paralysis or numbness or inability to move parts of the face, arm, or leg - particularly on one side of the body
• Confusion - including trouble with speaking

Multiple sclerosis

Common

A disease that affects central nervous system. The immune system attacks the myelin, the protective layer around nerve fibers and causes Inflammation and lesions. This makes it difficult for the brain to send signals to rest of the body.

Symptoms may include:

• Muscle weakness
• Numbness
• Tingling or weakness (weakness may range from mild to severe)

Myasthenia gravis

Extremely rare

A neuromuscular disorder that leads to weakness of skeletal muscles.

Symptoms may include:

• Muscle weakness
• Eye problems such as drooping and double vision
• Problems with speaking, swallowing (leading to choking easily), and chewing