the polio epidemic was a pretty serious epidemic it happened just about the first have of the nineteen hundreds. or something like that and polio was a disease that struck quickly and left no living before you could get any help, not like a heart attack this person named Jonas Salk. worked on away at a vaccine hoping that the deadly virus would still get you sick but your body still was able to figure out how to destroy it so if they actually got it your body would be able yo fight it this vaccine worked very well he worked with three groups of children because the children I think are the only people that I think can get it one he gave the vaccine another something else and another nothing the people with the vaccine did the best now that very vaccine may still be used today in 2020.
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so I have read this part before but I never told you about it this is quite interesting. called rooster earplugs the rooster lets out a cockle doodle do that has 140 decibels. of sound that's loud enough to defend. you that is why the rooster does it in a high place and away from the hens. so he doesn't deafen them also the rooster has these built-in earplugs that totally block up his ear ducts. also he has a lot of hair or something like that in there so it would have to get through that. see even in this stupid animal God has put in these amazing adaptions or something like that other than adaptions.
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