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Fig. 1 | International Journal for Equity in Health

Fig. 1

From: Strategies comparison in response to the two waves of COVID-19 in the United States and India

Fig. 1

The COVID-19 epidemic curve of the United States. Notes: (1) On February 2, 2020, non-US citizens from or recently in China were prohibited from entering. (2) On February 29, 2020, the FDA announced an "emergency use authorization" to expand testing capabilities. (3) From March 8, 2020, the colleges and universities across the United States suspended classes one after another. (4) On March 13, 2020, US President Trump declared a national emergency. (5) On March 16, 2020, the government considered taking measures such as quarantine and curfew in "hot spots", but not nationwide. (6) On March 21, 2020, the federal government closed the US borders with Canada and Mexico. (7) On March 30, 2020, Washington issued a stay-at-home order. (8) On April 6, 2020, the CDC announced that it would conduct antibody tests on a wider range of people to determine whether more people had been infected with COVID-19 and monitor the immunity of patients after they had recovered. (9) From April 20, 2020, South Carolina and other states or regions gradually reopened businesses and restaurants. (10) On May 1, 2020, more than 20 states, including Texas and Georgia, entered the stage of resuming work and production, and many states have successively introduced plans to restart the economy. (11) On May 13, 2020, Washington D.C Mayor announced extending the local state of emergency, public health emergency and the implementing of the "home order". (12) On July 6, 2020, the ICE announced that international students would be required to leave the country if all US schools began long-distance e-learning in the fall of 2020. And if the school only offered online courses, the immigration office would not issue visas to international students who were still abroad. (13) On July 14, 2020, the rule that international students could not enter or stay in the United States with only online classes was officially lifted. (14) From September 14, 2020, the USG canceled the requirements for directing all flights carrying airline passengers arriving from, or recently had a presence in, certain countries to land at one of 15 designated airports and stopped strengthening entry health screening for these passengers. (15) On November 15, 2020, the Governor of Washington announced statewide restrictions. (16) On December 3, 2020, California issued a stay-at-home order. (17) On December 28, 2020, the CDC required air passengers from the UK to the US to provide evidence of a negative virus test within 72 h before boarding. (18) On January 26, 2021, the CDC expanded the COVID-19 negative test requirements for all air passengers entering the US, requiring passengers arriving in the US from foreign countries to be tested within 3 days before flight departure and to present an order certifying a negative test before boarding. (19) On February 2, 2021, the CDC required individuals to wear masks in all transportation networks in the United States. (20) On February 17, 2021, the Biden government announced the upcoming action on expanding COVID-19 testing capabilities. (21) On May 13, 2021, the CDC announced that in most cases, fully vaccinated Americans no longer need to wear masks indoors and no longer need to maintain social distance

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