In 1958, scientists at the CDC made their first trip overseas. A team went to Southeast Asia to respond to an epidemic of smallpox and cholera. Since then, the CDC has been active throughout the world, following infectious [diseases] such as smallpox, polio, tuberculosis, AIDS, and SARS. *** So where did this killer flu come from? In 2005, researchers at the CDC announced that it had probably started off as a bird flu and then jumped to humans. Does that sound familiar? The Spanish flu is very similar to the bird flu we see today. Some scientists believe it’s the same strain of influenza. What do these two passages have in common? Both mention the Spanish flu. Both mention smallpox. Both mention places the CDC travels to. Both mention diseases the CDC studies.

nobody can deny that cars are the most used means of transport all over the world. however owing a car could have some disadvantages. first of all, having a car on your own allows you to go everywhere without depending on timetables. moreover, you can use it whenever you need it no matter the time or the climate conditions. furthermore, if you have a car, you would not have to wait for nobody to share it when going to somewhere. nevertheless, one major disadvantages of owing a car is the fact that fuel is very expensive nowadays so that not everyone can afford it. in addition, you have to pay insurance to be protected by legal conditions. apart from this, the person who owns a car always has to maintain the car and repair any mechanical problem which could costs a huge amount of money. what is more, if you have to travel long distances, and you do not like driving, one probably would be exhausted and irritated due to driving for a long time. besides, cars cause environmental pollution. to sum up, owing a car means that you have more freedom to travel whenever and wherever people want to, however the car maintenance could be a very expensive issue that can have bad consequences at your economy.

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