Infectiousnes or Infectiousness: How To spell?
The word Infectiousnes is misspelled against Infectiousness, a noun meaning "The quality of being infectious."
Infectiousness has double 'ss' in the end mispronounced as 's'Remember double 'SS' appears in the end of this word which should not be misspelled with single 'S'
Wrong Spelling:  infectiousne-s  Correct Spelling:  infectiousne-ss 
Check more misspelled words of Infectiousness to spell it correct.