Got a symptom but not sure what's causing it? Use our award-winning symptom checker to find out – it's free!
Carbon monoxide is a poisonous gas that has no smell or taste.
More information on Carbon Monoxide Poisoning is available here.
If you are worried about this condition you can try our free AI Symptom Checker here
Hib (Haemophilus influenzae type b) is a bacterial infection that can cause a number of serious illnesses such as pneumonia or meningitis, especially in young children.
More information on Hi B is available here.
Encephalitis is an uncommon but serious condition that causes inflammation of the brain.
More information on Encephalitis is available here.
Important: If you have these symptoms, they may be unrelated to any of these conditions listed. If you are concerned about your symptoms then you should see a doctor.