The actual incidence is likely higher, because those affected are asymptomatic.

The Lareb report suggests the actual incidence to be higher.

No one knows the actual incidence because no one is counting.

Some 125,000 cases a year have been reported in the United States, but actual incidence of spontaneous thrombophlebitis is unknown.

The actual incidence of suicide in cancer patients is probably underestimated, since there may be reluctance to report these deaths as suicides.

So it's very hard to know what the actual incidence of crime is.

Past research indicates that the actual incidence of rabies in bat populations is less than 0.5% in most areas.

I must emphasize that the actual incidence of long-term unemployment is much higher in Ireland than statistics show.

The actual incidence of death or serious injury must also be considered.

The actual incidence was likely much higher.