Much mortality occurs at this stage due to summer drought.

Where mortality has occurred, it is principally in the three core risk groups (very young, elderly and immuno-compromised).

The study found excess mortality occurred among patients aged 10 to 40 years.

It progresses rapidly through involvement of multiple body systems and mortality occurs in less than a year from the initial diagnosis.

However, sudden morbidity and mortality can occur regardless of mutational status.

Light levels at which mortality of branches and individual trees occur are estimated for each species.

Extensive mortality has occurred, particularly east of the Appalachian Mountains.

In general, as the period of time between birth and inoculation decreases, less disease and mortality occurs.

During live trapping, high mortality may occur if individuals become wet in cold weather.

High nestling mortality often occurs when the young are 15 to 30 days old and may be a result of fratricide.