Hawkes argues that when our apeman ancestors were evolving in Africa, females normally died at child-bearing age.
In a group that size, about 2,000 would normally die from cancers not caused by radiation, so the extra dose would raise the total to 2,005 or 2,006.
It takes a chunk out of the immune system by using up the repertoire of cells that you have that can fight against other things older people normally die of – fighting off this year's flu, for example.
More than 99% of queens normally die over winter and spring, so small variations in this mortality rate can lead to massive differences in the numbers of nests each year.
Even making a mouse hybridoma is tricky: B cells from the spleen of an immunized mouse, which normally died out in culture dishes, must be fused with cancerous white blood cells called myelomas.
That in turn reflects swine flu as a whole, which in the seven months since the outbreak began has apparently killed fewer Americans than normally die every two weeks from "ordinary" flu during the season.
In mutant mice lacking the pro-apoptotic proteins Puma and Bim or expressing anti-apoptotic Bcl-2, substantially increased numbers of Treg were found in the thymus, showing that the large majority of developing Treg normally die (Tai et al., 2013).
People don't normally die from one bullet".
This is not the case for fish of the GRZ strain, which normally die before developing a macroscopic phenotype.
The present findings are consistent with the current consensus that CD4+ T cells normally die via activation-induced cell death (AICD) after repeated exposure to a single antigen, while naïve CD4+ T cells having a 'cross-reactive' TCR with lower affinity can be activated through repeated exposure to the same antigen and survive due to weak TCR signaling, ultimately acquiring autoreactivity [20].
