Vaccine hesitancy will not go away fast. In fact, there are parallels in the physical world to how quickly or slowly an object returns to its normal state.
Health care workers wait in line for vaccinations at a site in Los Angeles.
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With vaccine shortages looming, experts are debating whether it is important to receive two doses or whether it's better to give one dose to more people and give a second when the supply is better.
Seniors in Fort Myers, Fla. wait for their COVID-19 vaccinations. At this site, 800 doses of vaccine were available.
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The shipment of goods to suppliers has become technologically sophisticated. Delays in getting out the COVID-19 vaccine to people show that the breakdowns come down to something more basic.