In some cases, these vaccines use epitopesâthe very specific parts of the antigen that antibodies or T cells recognize and bind to. Because subunit vaccines contain only the essential antigens and not all the other molecules that make up the microbe, the chances of adverse reactions to the vaccine are lower.
Tornadoes occur in many parts of the world, including Australia, Europe, Africa, Asia, and South America. Even New Zealand reports about 20 tornadoes each year. Two of the highest concentrations of tornadoes outside the U.S. are Argentina and Bangladesh.
When it comes to the continents, North America is the powerhouse for tornado climatology. The United States and Canada combined boasts 80 percent of the worldâs tornadoes. That leaves the remaining 20 percent to be distributed across dozens of different countries, including those in continental Europe, as well as Bangladesh, South Africa, Australia, and Argentina among others.