Sinusitis is a common disease which means that a cold has spread from the mucous membrane of the nose to the mucous membrane of the sinuses. Common symptoms are you get a sore face and sniff that runs back in the throat. The disease usually goes away by itself but sometimes you may need treatment.
Here you can read more about various infections of the eyes, ears, nose and throat.
Diphtheria is caused by a bacterium that secretes a poison. The venom can damage many of the body's organs, such as the heart and kidneys. The disease infects only humans, through contact with saliva. Diphtheria is a life-threatening disease if you do not receive treatment.
Glandular fever is caused by a virus that is very common. Most people are infected by the virus as a child and often get no or mild symptoms. You who are infected with the virus first as a teenager or adult get the symptoms that are common in glandular fever. Once you have had the virus, you become immune and cannot become infected again.
Mumps disease is a very contagious viral infection that both children and adults can get. It is not treated but healed by itself. Vaccine against mumps is part of the vaccination program for children since 1982 and the disease is very rare many countries. Mumps can, in unusual cases, lead to meningitis or testicular inflammation.