Incubation period
The incubation period of primary syphilis varies between 10 and 90 days, with an average of 21 days, the manifestations of the secondary appear between 7 and 90 days after contact, and for the tertiary onset of the symptoms can be identified after 2-15 years after the infectious contact.
Infectiousness Period
Treponema pallidum can be transmitted through direct contact with active lesions, the healed ones are no longer contagious.