Retrovacination or Retrovaccination: How To spell?
The word Retrovacination is misspelled against Retrovaccination, a noun meaning "The inoculation of a cow with human vaccine virus."
Retrovaccination has double "cc" is mispronounced as "c"Remember double 'CC' in between the strings Retrova & ination which should not be misspelled with single 'C'
Wrong Spelling:  Retrova-c-ination  Correct Spelling:  Retrova-cc-ination 
Find more incorrect spellings of Retrovaccination to spell right way.