Present during World War I, the 1918 strain of pandemic influenza found many opportunities to spread through the war. At the time, science wasn’t advanced enough to study the virus, much less find a cure; medical personnel were helpless when it came to fighting the disease, and so the ...
The flu is another name for the influenza virus, a common respiratory virus that infects approximately one-billion people around the world each year. There are three types of influenza known as influenza A, B, and C. However, influenza C is extremely rare....
Alveolar mouths (AMs) are very important points for the formation of Masson bodies (MBs) and hyaline membranes (HMs), which are considered serious complications of influenza virus pneumonia. MBs arise by injury, caused by influenza virus infection of AMs, which cover the epithelial and endothelial...
◎Trivalent influenza vaccine: It is against the H1N1 and H3N2 virus lines of Stream A and the Victoria virus strain of Stream B. ◎Quadrivalent influenza vaccine: In addition to the above three virus lines, it also includes the B-stream Yamagata line,...
What kind of virus is the coronavirus? What is a plant virus? What is animal virus infection? What is a viral disease caused by? Which feature do viruses have in common with animal cells? What is virus transduction? What would the pathogen that causes influenza be considered?
HIV is a viral infection that slowly weakens your immune system. The virus kills a type of white blood cell called CD4. A normal CD4 count ranges from 500 to 2,000. You have HIV when your CD4 count ranges from 200 to 500. You have AIDS (acquired immune deficiency syndrome) when your...
Researchers divide flu viruses into three general categories: types A, B, and C. All three types can mutate, or change into new strains, and type A influenza mutates often, yielding new strains of the virus every few years. This means that you can never develop a permanent immunity to in...
What is influenza (the flu)?The flu is a viral infection of the lungs and airways. The virus spreads through droplets in the air when someone with the flu coughs or sneezes. The virus also spreads through close contact with someone who has the flu. For example, a person with the virus...
“I think we’re just more cautious of outbreaks now,” Jacqueline Stephens, PhD, a senior lecturer in public health at Flinders University in Australia, told the Guardian.“Everyone is hypervigilant, and you hear this term human metapneumovirus and it sounds kind of scary.” But HMPV is ...
This viral takeover is remarkably effective. In fact, each infected host cell is turned into an efficient factory that, depending on the virus, can manufacture up to a million new virions.4Each cell infected with an influenza virus produces up to 10,000 new virions—but in total, an infe...