4 ms·
In your example: if person A slept with person C before B did then B has an exposure to A, but A has no exposure to B.
by ryanpetrich 16y ago
In your example: if person A slept with person C before B did then B has an exposure to A, but A has no exposure to B.
- mattmaroon 16y agoRight, so there's one exposure regardless. You don't know who it is I suppose, but you know it's there.
- gjm11 16y agoAB then CD then BC: the graph looks like A-B-C-D but there's no chain A->D or D->A that actually permits infection.