The phrase "a decrease in vulnerability" is correct and usable in written English.
It can be used in contexts discussing risk management, safety, or resilience, where you want to indicate that the level of vulnerability has diminished.
Example: "The new security measures have led to a significant decrease in vulnerability to cyber attacks."
Alternatives: "a reduction in susceptibility" or "a decline in exposure".
We also observe a decrease in the vulnerability of nodes and reduction in single points of failure in the system, suggesting an increase in the overall resilience of the KIS system from 1960 to 2010.
Consequently, we found a decrease in the vulnerability for trauma related symptoms with an increased duration in the bush, when the correlation between trauma symptoms and the duration in the bush is controlled for the number of self-experienced event types.
Moreover, such a decrease in foraging activity reduces vulnerability to predation [2], [7], [8], [46], [47].
Ageing is a decrease in viability and an increase in vulnerability.
This decrease in vulnerability may reflect increasing protection of the mother and fetus from adverse influences during pregnancy.
Even if the factors influencing low birthweight are not well understood, this decrease in vulnerability may imply increasing protection of the mother and fetus from additional adverse influences after the Wenchuan earthquake [14].
[36], [37] The reactivity of the two major components involved in the maternal stress response, the HPA and sympathetic-adrenal-medullary axis, are dampened during pregnancy.[36], [37] For example, the known decrease in vulnerability to acute stress induced by earthquake may reflect increasing protection of the mother and fetus from stress or other adverse influences during pregnancy.
However, a decrease in osmolarity does lead to increased vulnerability of chondrocytes to physical damage (Bush et al., 2005).
Loss of corneal nerve fibers in patients with diabetes has been linked to functional changes in the cornea such as a decrease in corneal sensitivity as well as vulnerability to corneal trauma: a process similar to loss of sensation and subsequent trauma in the lower limbs (16, 17).
Finally, increased vulnerability correlates with a decrease in the positive regulation of DNA repair.
