ADThe coronavirus pandemic isn’t over, but its psychological grip on the United States has weakened. Pandemic fatigue, warmer weather and a surge in vaccinations have led to a spring fever palpable across much of the country.Last weekend, more than 1.5 million Americans on Sunday alone, a new high for the pandemic and triple the figure from the same period in 2020 during the , figures from the Transportation Security Administration show.Cellphone mobility data analyzed by The Washington Post show movement steadily increasing everywhere except in large cities, where office buildings...…ADThe coronavirus pandemic isn’t over, but its psychological grip on the United States has weakened. Pandemic fatigue, warmer weather and a surge in vaccinations have led to a spring fever palpable across much of the country.Last weekend, more than 1.5 million Americans on Sunday alone, a new high for the pandemic and triple the figure from the same period in 2020 during the , figures from the Transportation Security Administration show.Cellphone mobility data analyzed by The Washington Post show movement steadily increasing everywhere except in large cities, where office buildings...WW…