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.
Tornadoes can occur in any place that thunderstorms occur. The most active region for tornadoes is in in Kansas, Oklahoma, Texas, and Nebraska. Other hot spots for tornadoes a â¦ re in Florida, Australia, South Africa, India, Bangladesh,and Argentina.Most of the time in the Midwest is where air masses mostly meet.Although, they can form in other places too.ornadoes can occur nearly anywhere that gets thunderstorms, which is anywhere in the world except Antarctica. They are rare in the Northern polar region as well. They are very prevalent in the 40 to 60 degree latitudes in both hemispheres.