Scientists are creating vaccinations that prevent people from getting bird flu. If the virus mutates, a new vaccine needs to be made. The vaccine needs to be tested, which can be dangerous. It also takes a long time for scientists to know whether the vaccine works.
Answer:
C. Wearing SPF 30 or greater suncreen on all parts of her body exposed to sun.
Explanation:
Whether it is cloudy or not you should always wear suncreen because it protects you from the rays of sun. Although you don't feel any different when it is a nice day and the sun isn't buning you, the sun is still affecting you with it's rays. Sunscreen protects you from teh rays. Drinking water is always important, you should always stay hydrated or body shuts down. Wearing light long pants and shirts is always good too, a color that is brighter is better, dark colors attrack the sun.
The motor unit is composed of both the skeletal and muscular systems.
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