History, 12.03.2021 19:40 jayleengrant
Which statement is untrue about Dr. Jonas Stalk? He developed a vaccine for polio by 1955. He patented the polio vaccine so people could only buy it from him. He helped create a flu vaccine during WW2. His work helped modern vaccines to be developed.​
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Which statement is untrue about Dr. Jonas Stalk? He developed a vaccine for polio by 1955. He patent...
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