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? Yellow fever is a viral disease. In most cases it leads to relatively mild symptoms including fever, chills, nausea, and muscle pain, and these resolve within a few days. However, in about 15% of cases, the illness proceeds to a toxic phase. This presents itself as more fever, a yellowish skin and abdominal… Continue reading What happens in yellow fever, exactly?
What is it? Malaria is an infectious disease caused by a type of parasitic protozoa. Humans become infected if they are bitten by a mosquito that carries the protozoa. Typical symptoms of malaria include fever, fatigue, vomiting, and headache. In severe cases the patient’s skin can also turn yellow, and seizures, coma, or death can… Continue reading What happens in malaria, 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? Sleeping sickness, also known as African trypanosomiasis, is a parasitic disease caused by protozoa of a species called Trypanosoma brucei. The first symptoms appear 1-3 weeks after infection. These include fever, headache, itchiness, and joint pain. Weeks to months later the second phase of the disease sets in, and now patients experience things like confusion,… Continue reading What happens in sleeping sickness, exactly?