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Is the Travel Bubble under COVID-19 a Feasible Idea or Not?
Yu JH, Lin HH, Lo YC, Tseng KC, Hsu CH. Yu JH, et al. Int J Environ Res Public Health. 2021 May 26;18(11):5717. doi: 10.3390/ijerph18115717. Int J Environ Res Public Health. 2021. PMID: 34073467 Free PMC article.