John Smith improved conditions in Jamestown, because he married the chief's daughter Pocahontas, which improved relations between the settlers and the Powhatan Confederacy. When the settlers were on good terms with the Powhatan Confederacy, they were able to have a food supply throughout the winter, as the Native Americans would help them with this and this greatly helped their existence.
Answer:
On October 19, 1960 (almost two years after the Cuban Revolution had led to the deposition of the Batista regime) the U.S. placed an embargo on exports to Cuba except for food and medicine after Cuba nationalized American-owned Cuban oil refineries without compensation.
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They haven't been vaccinated against diseases that are common in Europe or their bodies aren't adapted to European lifestyles
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Explanation:
Details? What are the improvements?