What causes HBsAg?

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  1. #hepatitis
  2. #delivery
  3. #vaginal
  4. #causes
  5. #found
  6. #newborn
  7. #through
  8. #bodily
  9. #fluids
  10. #infection
  11. #blood
  12. #caused
  13. #transmitted
  14. #semen
  15. #virus
  16. #mother
  17. #during