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. 2022 Feb 22;19(5):2508. doi: 10.3390/ijerph19052508

Figure 10.

Figure 10

Thematic evolution of keywords in field of research on NoV disease 1991–2021. Note: This thematic helps analyze the flow conditions of diverse themes in the field of NoV, and clarifies quantitative evidence such as thematic flow, direction of thematic flow, and conversion associations. The thicker the line, the higher the significance of the two themes over the year. Color helps distinguish diverse research themes.