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An open single-cavity bullet mold and a closed two-cavity mold. A cast bullet is made by allowing molten metal to solidify in a mold.Most cast bullets are made of lead alloyed with tin and antimony; but zinc alloys have been used when lead is scarce, and may be used again in response to concerns about lead toxicity.
Poliomyelitis (/ ˌ p oʊ l i oʊ ˌ m aɪ ə ˈ l aɪ t ɪ s / POH-lee-oh-MY-ə-LY-tiss), commonly shortened to polio, is an infectious disease caused by the poliovirus. [1] Approximately 75% of cases are asymptomatic; [5] mild symptoms which can occur include sore throat and fever; in a proportion of cases more severe symptoms develop such as headache, neck stiffness, and paresthesia.
He and his children contracted polio in 1955 during a campaign for city council. His children recovered, however Collins used a wheelchair or crutches for the rest of his life. [125] Julian Critchley: 1930–2000 Writer, broadcaster and Conservative Member of Parliament. He contracted polio in his youth and was much later affected by paralysis ...
Three billion children have been vaccinated against polio since 1988, according to the Global Polio Eradication Initiative, meaning 20 million people who would’ve otherwise been paralyzed by ...
Most cases of polio occur in children under 5 years old. “Historically, poliomyelitis is mostly a disease of children because children are unprotected, unvaccinated and more likely to become ...
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Since 1990, when the vaccine was introduced as a routine vaccination in children, rates of acute Hepatitis B has decreased in the United States by 82%. This vaccine is given as a series of shots, the first dose is given at birth, the second between 1 and 2 months, and the third, and possibly fourth, between 6 and 18 months.
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