"stubborn disease" meaning in English

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "name": "English entries with incorrect language header",
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      "examples": [
        {
          "ref": "1966, Israel Journal of Botany - Volumes 15-17, page 131",
          "text": "The extremely low number of control plants infected by stubborn disease suggests that natural spread of stubborn in the vicinity of the experiments is much slower than that reported for psylla-borne greening in South Africa (Schwarz, 1964).",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A disease of citrus trees characterized by stunted growth and misshapen fruit, caused by Spiroplasma citri."
      ],
      "id": "en-stubborn_disease-en-noun-N0SIcNNi",
      "links": [
        [
          "disease",
          "disease"
        ],
        [
          "citrus",
          "citrus"
        ],
        [
          "stunt",
          "stunt"
        ],
        [
          "growth",
          "growth"
        ],
        [
          "misshapen",
          "misshapen"
        ],
        [
          "fruit",
          "fruit"
        ]
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "stubborn disease"
}

{
  "head_templates": [
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      "expansion": "stubborn disease (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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      ],
      "examples": [
        {
          "ref": "1966, Israel Journal of Botany - Volumes 15-17, page 131",
          "text": "The extremely low number of control plants infected by stubborn disease suggests that natural spread of stubborn in the vicinity of the experiments is much slower than that reported for psylla-borne greening in South Africa (Schwarz, 1964).",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A disease of citrus trees characterized by stunted growth and misshapen fruit, caused by Spiroplasma citri."
      ],
      "links": [
        [
          "disease",
          "disease"
        ],
        [
          "citrus",
          "citrus"
        ],
        [
          "stunt",
          "stunt"
        ],
        [
          "growth",
          "growth"
        ],
        [
          "misshapen",
          "misshapen"
        ],
        [
          "fruit",
          "fruit"
        ]
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "stubborn disease"
}