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.
You're still not 100 percent safe from tornadoes. Tornado alleys are the regions most affected by twisters, but twisters can and do form anywhere. While the weather conditions and topography of the United States make tops for tornadoes of any country in the world, they form in other places such as Canada, the UK, Europe, Bangladesh, and New Zealand.