Noting that the variant has already been detected in many countries and that closing borders often has limited effect, the World Health Organization called for frontiers to remain open.
from https://www.reviewjournal.com/news/nation-and-world/omicron-cases-rise-as-research-goes-on-borders-close-2487468/
from
https://calliduselctric.tumblr.com/post/669165312700219392
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