Pertusis or Pertussis: How To spell?

The word Pertusis is misspelled against Pertussis, a noun meaning "The whooping cough."

Pertussis has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings pertu & is which should not be misspelled with single 'S'
Wrong Spelling:  pertu-s-is 
Correct Spelling:  pertu-ss-is 
Check more misspelled words of Pertussis to spell it correct.

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