O tempora

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Across
  1. 3. They may give immunity against nasty epidemic starting, lacking a plan (8)
  2. 4. Disco video content goes viral? (5)
  3. 7. NHS supporters, ring any bells? (8)
  4. 9. lifesaver not at liver transplant (10)
Down
  1. 1. Feature a country with earliest outbreak (5)
  2. 2. Infection of the ear, novel,leading to more complaints (9)
  3. 5. Confront ministry head with question, "will one offer protection"?(4,4)
  4. 6. Captured by Nawab or Isis leader (5)
  5. 8. Inserting a pipe whilst having a bath, it's a Rasta thing (10)