84. There are three main types of virus that cause flu, which are called type A, B and C. type A is the most powerful of the three, and undergoes minor changes in its genetic material every few years. The new form of the virus is called a strain. The new strain is not affected ...
Also known as: flu, grippe Written and fact-checked by The Editors of Encyclopaedia Britannica Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. The...
In 2024, mpox again began to spread rapidly in the DRC, this time involving an especially deadly strain of clade I virus. On August 14, following the spread of mpox to nearby previously unaffected African countries, WHO declared the outbreak a global health emergency. By that time, the DRC...
Flu symptoms, such as body aches, fever, headache, and swollen lymph nodes around the genitals, anus, or mouth The initial outbreak is often the worst. Because herpes lives in the nerve cells for the remainder of your life, you could experience recurrent outbreaks. However, recurrent outbreaks...
Type A has two different subtypes or strains, based on the chemical structure of the virus. The H1N1 swine flu virus is a type A influenza virus. Type B is not divided into subtypes. Both type A and type B are responsible for the seasonal influenza outbreaks. Outbreaks occur more ...
Seasonal flu vaccines, which contain strains of influenza A and B, do not protect against influenza C viruses, cautions the CDC. Influenza D This strain of influenza is not known to cause illness in humans. A relatively new strain, it primarily affects cattle, though one report notes that ...
Bursitis is inflammation of abursa, a small sac that functions to reduce friction between bone and soft tissue. There are 160bursaein the body with the largest mainly near the hip, knee, shoulder, and elbow tendons. Signs and symptoms of bursitis are directly related to the degree of inflamm...
Children can have problems with anxiety.[8] I (Jim Folk) remember having strong anxiety and panic attacks at the age of 7. At that time, I just felt “sick in the stomach” and an overwhelming sense of doom, which my parents labeled as the stomach flu. But as my anxiety grew worse...
There are three main types of virus that cause flu, which are called type A, B and C. type A is the most powerful of the three, and undergoes minor changes in its genetic material every few years. The new form of the virus is called a strain. The new strain is not affected by th...
Another strain (type) of Chlamydia trachomatis, which can be distinguished in specialized laboratories, causes the STD known as lymphogranuloma venereum (LGV; see below). Symptoms of chlamydia The majority of women with chlamydia do not have symptoms. Cervicitis (infection of the uterine cervix) ...