Question: what does The Afflicted and Theresa Knorr have in common?

Context paragraphs:
Corneal ulcer: Corneal ulcer, or ulcerative keratitis, is an inflammatory or more seriously, infective condition of the cornea involving disruption of its epithelial layer with involvement of the corneal stroma.  It is a common condition in humans particularly in the tropics and the agrarian societies.  In developing countries, children afflicted by Vitamin A deficiency are at high risk for corneal ulcer and may become blind in both eyes, which may persist lifelong.  In ophthalmology, a corneal ulcer usually refers to having an infectious cause while the term corneal abrasion refers more to physical abrasions.

Trichophyton verrucosum: Trichophyton verrucosum, commonly known as the cattle ringworm fungus, is a dermatophyte largely responsible for fungal skin disease in cattle, but is also a common cause of ringworm in donkeys, dogs, goat, sheep, and horses.  It has a worldwide distribution, however human infection is more common in rural areas where contact with animals is more frequent, and can cause severe inflammation of the afflicted region.  "Trichophyton verrucosum" was first described by Emile Bodin in 1902.

The Afflicted (film): The Afflicted (also known as Another American Crime) is a 2011 horror film written and directed by Jason Stoddard.  It is loosely based on the crimes of California killer Theresa Knorr.

February 9–10, 2010 North American blizzard: The February 9–10, 2010 North American blizzard was a winter and severe weather event that afflicted the Midwest, Mid-Atlantic and New England regions of the United States between February 9–11, 2010, affecting some of the same regions that had experienced a historic Nor'easter three days prior.  The storm brought 10 to of snow across a wide swath from Washington, DC to New York City, with parts of the Baltimore metro area receiving more than 20 in .  This storm began as a classic "Alberta clipper", starting out in Canada and then moving southeast, and finally curving northeast while rapidly intensifying off the New Jersey coast, forming an eye.  The National Weather Service, in an interview with The Baltimore Sun's weather reporter Frank Roylance, likened this storm to a Category 1 hurricane.  Forecasters told Roylance that "Winds topped 58 mph over part of the Chesapeake Bay, and 40 mph gusts were common across the region as the storm's center deepened and drifted slowly along the mid-Atlantic coast".  This storm system, in conjunction with the first storm 3 days prior, has been nicknamed Snoverkill.

Tachina fera: Tachina fera is a species of fly in the genus "Tachina" of the family Tachinidae.  It is found across Europe as far north as Scandinavia.  Its larvae are parasitoids of the caterpillars of moths in the family Noctuidae; afflicted species include the Broom Moth "Ceramica pisi", the Dun-Bar "Cosmia trapezina", Small Quaker "Orthosia cruda" and Common Quaker "Orthosia cerasi".

Exocrine pancreatic insufficiency: Exocrine pancreatic insufficiency (EPI) is the inability to properly digest food due to a lack of digestive enzymes made by the pancreas.  EPI is found in humans afflicted with cystic fibrosis and Shwachman–Diamond syndrome, and is common in dogs. EPI is caused by a progressive loss of the pancreatic cells that make digestive enzymes; loss of digestive enzymes leads to maldigestion and malabsorption of nutrients from normal digestive processes.  Chronic pancreatitis is the most common cause of EPI in humans and cats.  In dogs, the most common cause is by "pancreatic acinar atrophy", arising as a result of genetic conditions, a blocked pancreatic duct, or prior infection.

Iniencephaly: Iniencephaly, a term derived from the Greek word "inion" for nape of the neck, is a rare type of cephalic disorder that was first described by Étienne Geoffroy Saint-Hilaire in 1836.  Those afflicted with the disorder all share 3 common characteristics: a defect to the occipital bone, spina bifida of the cervical vertebrae and retroflexion (backward bending) of the head on the cervical spine.  Stillbirth is the most common outcome, with a few rare examples of live birth, after which death almost invariably occurs within a short time.

Paal–Knorr synthesis: The Paal–Knorr Synthesis in organic chemistry is a reaction that generates either furans, pyrroles, or thiophenes from 1,4-diketones.  It is a synthetically valuable method for obtaining substituted furans and pyrroles, common structural components of many natural products.  It was initially reported independently by German chemists Carl Paal and Ludwig Knorr in 1884 as a method for the preparation of furans, and has been adapted for pyrroles and thiophenes.  Although the Paal–Knorr synthesis has seen widespread use, the mechanism wasn't fully understood until it was elucidated by V. Amarnath "et al." in the 1990s.

Theresa Knorr: Theresa Jimmie Francine Knorr (née Cross; born March 14, 1946) is an American woman convicted of torturing and murdering two of her six children while using the others to facilitate and cover up her crimes.  She is currently serving two consecutive life sentences at the California Institution for Women in Chino, California.

Equine viral arteritis: Equine viral arteritis (EVA) is a disease of horses caused by equine arteritis virus, an RNA virus of the genus "Arterivirus".  The virus which causes EVA was first isolated in 1953, but the disease has afflicted equine animals worldwide for centuries.  It has been more common in some breeds of horses in the United States, but there is no breed "immunity".  In the UK, it is a notifiable disease.  There is no known human hazard.

Supporting paragraphs: The Afflicted (film) Theresa Knorr
Answer: California