What is it? Chickenpox is a very contagious viral disease. It is known for the small, itchy blisters it causes. Other common symptoms include fever, tiredness and headache. Chickenpox is very common – in 2013 about 140 million cases occurred worldwide. However, practically everyone went through the disease before the chickenpox vaccine was developed, and the… Continue reading What happens in chickenpox, exactly?
What is it? Zika fever is an infectious disease caused by the Zika virus. Despite the extensive media coverage the disease is mostly harmless – in the majority of cases there are no symptoms at all, and when there are, they are usually mild and resolve within a week. The most common symptoms include fever,… Continue reading What happens in Zika fever, exactly?
What is it? Dengue fever is a disease caused by the dengue virus. It is transmitted through mosquito bite. Symptoms begin a few days after infection, and they include a high fever, headache, vomiting, pain in muscles and joints, and a skin rash. The affected usually recover within a couple of days. Sometimes, however, dengue… Continue reading What happens in dengue fever, exactly?
What is it? Tonsillitis is an inflammation of the tonsils. It is most commonly caused by a viral or bacterial infection – when it’s caused by a bacterium called group A streptococcus, the condition is sometimes referred to as strep throat. The most noticeable symptom is often pain in the throat, which gets very bad when… Continue reading What happens in tonsillitis, exactly?
What is it? Mumps is a viral infection. It first causes more general symptoms like fever, muscle pain, headache, and fatigue, but later it can lead to a painful and visible swelling of one or both parotid glands. The symptoms usually resolve within 7-10 days. About 20-40% of those infected don’t show any symptoms. Without… Continue reading What happens in mumps, exactly?
What is it? Rabies is a viral disease that causes acute inflammation of the brain. It is present in humans as well as other mammals, and it causes around 24 000 – 60 000 deaths per year, most of which occur in Asia and Africa. Rabies is spread through the bite of an infected animal:… Continue reading What happens in rabies, exactly?
What is it? Smallpox is a life-threatening infectious disease. The symptoms appear after one to two weeks after infection, and begin as those typical to the flu, such as fever, headache, and fatigue. A few days later, flat red spots appear on the face and hands, spreading from there over the rest of the body. These spots… Continue reading What happens in smallpox, exactly?