Ok

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Across
  1. 1. kill all viruses and bacteria in an area or on a surface
  2. 3. that can prevent COVID-19 but still being developed
  3. 5. total number of COVID-19 cases has reached over 5 ______
Down
  1. 2. of the symptoms of COVID-19; increase of temperature
  2. 4. typical number of newly infected people from 1 case