text: var mongoose = require("mongoose");
  
  var vaccineSchema = mongoose.Schema({
    name: {
      require: true,
      type: String,
    },
    fabricator: {
      require: true,
      type: String,
    },
    country: {
      require: true,
      type: String,
    },
    dose: {
      require: true,
      type: Number,
    },
    update_at: {
      require: false,
      type: Date,
    },
    created_at: {
      require: false,
      type: Date,
    },
  });
  
  var Vaccine = (module.exports = mongoose.model("vaccine", vaccineSchema));
  
  module.exports.get = function (callback, limit) {
    Vaccine.find(callback).limit(limit);
  };
  