HOW TO PREVENT THE COVID-19

The video deals with the care that must be taken to avoid becoming infected with covid-19, such as putting on face masks, not being in crowds, not having physical contact, respecting quarantine and being aware of what is happening.

 angie beltran



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BUBONIC PLAGUE

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                                                          The bubonic plague I n the book he tells us that it was the one that changed human history, it is also known as the black plague, bubonic plague. The plague is the cause of the "black death" that spread in Asia, Europe, and Africa in the 14th century and that killed about 100 million people, that is, between 25% and 60% of the European population This onset by those insects that transmitted was transmitted through flies and fleas spread through the bite or sting of infected insects, there were three outbreaks Bubonic plague is an infection in the lymphatic system caused by the bite of an infected flea, Xenopsylla cheopis (the rat flea). The flea is a parasite in house and field rats, looking for another prey when the rodent it lives in dies. The bacteria are located in the digest...
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