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You can do a lot of things with minimal risk after being vaccinated. Although our public health expert says that maybe it's not quite time for a rave or other tightly packed events. Above: Fans take photographs of Megan Thee Stallion at a London show in 2019. Ollie Millington/Getty Images hide caption

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Ollie Millington/Getty Images

Dishwashers have come a long way since this 1921 model, which was designed mainly to help minimize the drudgery of housework. But today's sleek models are also designed with water conservation in mind. Bettmann/Bettmann Archive/Getty Images hide caption

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Bettmann/Bettmann Archive/Getty Images

Ignaz Semmelweis washing his hands in chlorinated lime water before operating. Bettmann/Corbis hide caption

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The Doctor Who Championed Hand-Washing And Briefly Saved Lives

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