In the 14th century, the bubonic plague killed more than 2/3 of Europeans. The plague was transmitted by fleas who were infected by rats and would inject a bacteria into the bloodstream that shuts down a person's immune system. While not as common today, the bubonic plague still exists, infecting around a thousand people a year. There are about seven cases in the United States each year, many of those in Arizona and New Mexico. Scientists have discovered that the bacteria works by affecting signaling pathways in the immune system. Based on what you know so far, which of these pathways do you think is the most likely? In the 14th century, the bubonic plague killed more than 2/3 of Europeans. The plague was transmitted by fleas who were infected by rats and would inject a bacteria into the bloodstream that shuts down a person's immune system. While not as common today, the bubonic plague still exists, infecting around a thousand people a year. There are about seven cases in the United States each year, many of those in Arizona and New Mexico. Scientists have discovered that the bacteria works by affecting signaling pathways in the immune system. Based on what you know so far, which of these pathways do you think is the most likely? In the 14 th century, the bubonic plague killed more than 2/3 of Europeans. The plague was transmitted by fleas who were infected by rats and would inject a bacteria into the bloodstream that shuts down a person's immune system. While not as common today, the bubonic plague still exists, infecting around a thousand people a year. There are about seven cases in the United States each year, many of those in Arizona and New Mexico. Scientists have discovered that the bacteria works by affecting signaling pathways in the immune system. Based on what you know so far, which of these pathways do you think is the most likely?.

1. In the 14th century, the bubonic plague killed more than 2/3 of Europeans. The plague
was transmitted by fleas who were infected by rats and would inject a bacteria into the
bloodstream that shuts down a person's immune system. While not as common today,
the bubonic plague still exists, infecting around a thousand people a year. There are
about seven cases in the United States each year, many of those in Arizona and New
Mexico. Scientists have discovered that the bacteria works by affecting signaling
pathways in the immune system.
Based on what you know so far, which of these pathways do you think is the most
likely?
In the 14th century, the bubonic plague killed more than 2/3 of Europeans. The plague was
transmitted by fleas who were infected by rats and would inject a bacteria into the bloodstream
that shuts down a person's immune system. While not as common today, the bubonic plague still
exists, infecting around a thousand people a year. There are about seven cases in the United
States each year, many of those in Arizona and New Mexico. Scientists have discovered that the
bacteria works by affecting signaling pathways in the immune system. Based on what you know
so far, which of these pathways do you think is the most likely? In the 14 th century, the bubonic
plague killed more than 2/3 of Europeans. The plague was transmitted by fleas who were
infected by rats and would inject a bacteria into the bloodstream that shuts down a person's
immune system. While not as common today, the bubonic plague still exists, infecting around a
thousand people a year. There are about seven cases in the United States each year, many of
those in Arizona and New Mexico. Scientists have discovered that the bacteria works by
affecting signaling pathways in the immune system. Based on what you know so far, which of
these pathways do you think is the most likely?