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. 2020 May 12;17(10):3370. doi: 10.3390/ijerph17103370

Table 11.

Summary of word cloud and co-occurrence maps for five time series.

Time Period Top 5 Author Keywords Top 3 Cluster in Cooccurrence Map
2000–2003
  • -

    Coronavirus (168)

  • -

    Mouse hepatitis virus (137)

  • -

    Identification (90)

  • -

    Murine coronavirus (82)

  • -

    Acute respiratory syndrome (71)
  • -

    Red cluster (protein and gene)

  • -

    Yellow cluster (mouse hepatitis)

  • -

    Blue cluster (SARS and patient cases study)
2004–2007
  • -

    Acute respiratory syndrome (718)

  • -

    Coronavirus (518)

  • -

    Identification (477)

  • -

    SAR Scoronavirus (335)

  • -

    Virus (322)
  • -

    Red cluster (Pneumonia and hospital patient)

  • -

    Green cluster (virus structure, interaction and replication)

  • -

    Blue cluster (s protein and mouse study)
2008–2011
  • -

    Coronavirus (159)

  • -

    SARS Cov (88)

  • -

    SARS (74)

  • -

    Severe acute respiratory syndrome (39)

  • -

    Infectious bronchitis virus (37)
  • -

    Red cluster (protein structure and interact mechanism)

  • -

    Green cluster (patient diagnosis and sample)

  • -

    Blue cluster (immune response and t cell study on mouse)
2012–2015
  • -

    Coronavirus (252)

  • -

    MERS Cov (96)

  • -

    Infectious bronchitis virus (65)

  • -

    SARS (60)

  • -

    Epidemiology (44)
  • -

    Red cluster (Cell, protein study test on mouse)

  • -

    Green cluster (respiratory virus patient study)

  • -

    Blue cluster (IBV and Phylogenetic analysis of bat, cat and pig)
2016–2019
  • -

    Coronavirus (384)

  • -

    MERSCov (245)

  • -

    Infectious bronchitis virus (87)

  • -

    Porcine epidemic diarrhea virus (74)

  • -

    Influenza (64)
  • -

    Red cluster (Cell replication and neutralizing antibody)

  • -

    Green cluster (Respiratory virus and patient)

  • -

    Blue cluster (IBV, PEDV and phylogenetic analysis)