Calculo Diferencial E Integral De James Stewart 2da Edicion | Checked


Calculo Diferencial E Integral De James Stewart 2da Edicion | Checked



Calculo Diferencial E Integral De James Stewart 2da Edicion | Checked

calculo en lugar del diferente checked

la funciĆ³n de la ecuacion que hay

a ver el ejercicio de las ecuaciones de la derecha?

We have all heard about the flu spreading from place to place. But how the disease actually spreads is much more complicated than was thought before.

We are not as immune as we think. R. Bruce Cameron of Dalhousie University in Halifax, Nova Scotia, Canada, and his colleagues, have been studying the spread of the influenza virus with the most modern technology. They have come to the conclusion that we are not nearly as immune as we think we are. Cameron says, “Our findings indicate that people can get the flu from others, and they can pass it to others.”

If the virus can spread from person to person, especially in crowded places, such as a school, a ward in a hospital or a dormitory, we might be able to ward off the spread by trying to improve indoor air quality. Cameron has already shown that changes in air quality can alter the spread of the flu. Cameron says, “We’re saying, ‘Don’t blame me if I get sick today because it’s not my fault. My molecules, my cells, my genetic material are telling me to get sick. But when I breathe in a cloud of fine particles, I start fiddling around with these molecules and that changes the way they are carried in the body, and as a result, I could be contagious.’ It’s not just one thing in the air, but the whole assemblage.” Cameron says, “Viruses are always shuffling around in the air, in the atmosphere. They’re not in one place, you know. We see them when we get a big dump of rain, we see them when we have a dust storm, and they’re in lots of other places as well. So when there are big clouds of particulate matter floating around in the air, we’re going to see viruses a lot of the time. And the viruses are going to be in your lungs and in your nose and in your throat and in your eyes. The question is, what happens when you breathe in all these tiny particles?”

For this study, the researchers were able to analyze the relationship between exposure to air pollution and flu in a real world setting, with 4,000 people who took part in a study. They found that the risk of flu infection is much higher in

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