Their immunity renders them uniquely capable of caring for the children without fear of either contracting or transmitting the disease.
In turn, these effectors of innate immunity render effector T cells resistant to regulatory T cell (Treg -mediated suppression [18], [19].
Loss of natural immunity renders persons susceptible when visiting birth countries.
This change in balance of myelopoiesis and lymphopoiesis has important clinical consequences because the impaired adaptive immunity renders elderly people susceptible to an increased tumor incidence as well as a reduced vaccine efficacy [ 4, 5].
However, regulatory pathways that either develop intrinsically to reduce pathology, or result from parasite immune evasion strategies, can block successful immunity and render the host susceptible.
These processes, which are essential for the generation of adaptive humoral immunity, also render B cells susceptible to chromosomal rearrangements and point mutations that in some cases lead to cancer.
Depending on the milieu where Langerhans cells have encountered antigen (inflammatory versus non-inflammatory/steady-state), they make T cells proliferate and acquire effector functions (immunity) or render them unresponsive or even delete them (tolerance), respectively.
This herd immunity effect protects the unvaccinated, provided a threshold number of people are immunized and rendered immune.
After a 2010 tornado missed us by only a few miles, it seemed that the universe, with its sense of irony, had granted us immunity from twisters — thus rendering my investment of several thousand dollars unnecessary.
Therefore prevention of co-infection by incompatibility or rendering conjugation immunity to the host cell is unlikely to be a stable and effective strategy by itself.
