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Week-by-week distribution of variants from March 2020 to present (February 2020). We have encircled the most prevalent variants in each pandemic wave. Pointed line with numbers (· · ·) indicate the amount of positive cases detected in Vall d’Hebron Hospital per week. Pointed and slashed line (· - · -) indicates vaccine coverage in Barcelona city with one dose and slashed line (- -) with double doses.
