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.
As this map from the National Climatic Data Center shows, other global tornado hotspots include Bangladesh, South Africa, and Europe: On April 26, 1989, the deadliest tornado ever struck Bangladesh, killing about 1,300 people, injuring 12,000, and leaving 80,000 homeless.