North Atlantic right whales (Eubalaena glacialis) are big, but they're not the biggest whales. That distinction goes to the blue whale (Balaenoptera musculus), the largest animal on Earth. The orca's size of up to 31 feet (9.4 meters) makes it the largest dolphin. The sperm whale, on the other hand, may not be the biggest whale, but it has the biggest brain to have ever existed on Earth. A comparison chart of whale sizes helps put it all in perspective!
Chikungunya fever is caused by a virus that is spread to people through the bite of infected mosquitoes. Like Dengue, it is transmitted by Aedes mosquitoes, especially Aedes aegypti (the yellow fever mosquito) and Aedes albopictus (the Asian tiger mosquito).
Viruses. A virus is a very small germ. Viruses that are carried by mosquitoes are called arboviruses. Many arboviruses cause encephalitis, a swelling of the brain. St. Louis encephalitis (SLE) virus is the most common cause of encephalitis in Florida.During most years, one to 10 people are found to have the SLE virus.iruses. A virus is a very small germ. Viruses that are carried by mosquitoes are called arboviruses. Many arboviruses cause encephalitis, a swelling of the brain. St. Louis encephalitis (SLE) virus is the most common cause of encephalitis in Florida. During most years, one to 10 people are found to have the SLE virus.