"positivity rate" meaning in English

{
  "forms": [
    {
      "form": "positivity rates",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "positivity rate (plural positivity rates)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Epidemiology",
          "orig": "en:Epidemiology",
          "parents": [
            "Medicine",
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The percentage of people who have tested positive out of all of those who have been tested (for a given pathogen)."
      ],
      "id": "en-positivity_rate-en-noun-GwqLTynT",
      "links": [
        [
          "epidemiology",
          "epidemiology"
        ],
        [
          "percentage",
          "percentage"
        ],
        [
          "positive",
          "positive"
        ],
        [
          "test",
          "test"
        ],
        [
          "pathogen",
          "pathogen"
        ]
      ],
      "raw_glosses": [
        "(epidemiology) The percentage of people who have tested positive out of all of those who have been tested (for a given pathogen)."
      ],
      "related": [
        {
          "word": "sensitivity"
        },
        {
          "word": "specificity"
        }
      ],
      "topics": [
        "epidemiology",
        "medicine",
        "sciences"
      ]
    }
  ],
  "word": "positivity rate"
}

{
  "forms": [
    {
      "form": "positivity rates",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "positivity rate (plural positivity rates)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "sensitivity"
    },
    {
      "word": "specificity"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Epidemiology"
      ],
      "glosses": [
        "The percentage of people who have tested positive out of all of those who have been tested (for a given pathogen)."
      ],
      "links": [
        [
          "epidemiology",
          "epidemiology"
        ],
        [
          "percentage",
          "percentage"
        ],
        [
          "positive",
          "positive"
        ],
        [
          "test",
          "test"
        ],
        [
          "pathogen",
          "pathogen"
        ]
      ],
      "raw_glosses": [
        "(epidemiology) The percentage of people who have tested positive out of all of those who have been tested (for a given pathogen)."
      ],
      "topics": [
        "epidemiology",
        "medicine",
        "sciences"
      ]
    }
  ],
  "word": "positivity rate"
}