IFNG and infection: Both Th1 and Th17 T cells expressed TNFα and IL-2, but then progressed to also express IFNγ at day 7 post infection (Fig. 3b–d, or Supplementary Fig. 6, which show day 14 post infection in both vaccinated and nonvaccinated mice having received a dose of 103, or even 102 IFUs).