In the latest figures released from the Oklahoma Department of Health, the number of flu deaths this season now stands at 13, up from 10 earlier this month.
The OSDH says two of those deaths, one each in Grady and Oklahoma counties occurred in February and March. The agency cited late reports from hospitals. The newest death happened last week in Creek County.
Six deaths are among people 65 or older and four were 50 to 64-years-old. Two were between 18 and 49 and one was between 5 and 17-years-old.
The 2015-16 influenza season in Oklahoma is much less severe than last season when 114 people died and more than 2,000 people were hospitalized.
Here is a list of flu deaths for the current season, which began in October 2015: