Flu season has been spreading throughout California, and state public health officials have reported that 147 people under the age of 65 have died from the flu as of Jan. 25.
According to SFGate, an additional 52 deaths were reported on Friday. 44 deaths are currently under investigation.
Only 14 deaths under the age of 65 were reported last year around the same time, and only 106 people were killed by influenza that whole season.
Four confirmed deaths were of children, according to the Los Angeles Times. 17 deaths have occurred in Los Angeles, and 13 have occurred in San Bernardino. Five each have occurred in Riverside and Orange County.
Officials said that the reason this flu season is more deadly than usual is that the primary strain of influenza going around is H1N1, commonly known as "swine flu."
This is the most serious outbreak of influenza since the 2009 swine flu pandemic, which made California require its counties to report every flu death if the deceased person is under 65.
There is no shortage of vaccinations, and state officials have encouraged people with the flu to undergo immunization at their local flu vaccine locations.