Hi SpaceCommando,

I was intrigued by this as my Uncle died of Rocky Mountain spotted Fever, before I was born. It was a tick born disease. Very much like these symptoms in the video. He, as the video suggested, fell asleep and never woke up. He showed signs of the flu, and a terrible headache. Sometime around 1940. He was around 12yrs old.

So, I looked it up.. There are loads of symptoms described. Sore throat, high fever, delirium, headaches, Parkinson like shaking or jerking, and in about 50% of the cases Coma.. Some progressed to death. Most survivors had lingering neurological symptoms.

Not trying to say this video is wrong, just showing you what I found.. :-)

Lynda

PS Almost all the medical sites are putting the worldwide epidemic at around 1MIL.. ????

Although encephalitis lethargica was first officially recognized as a separate disease entity in 1917, Crookshank (1918) identified several historical epidemics that resembled encephalitis lethargica, including the English sweats (England, 1529), mal mazzuco (Italy, 1597), Kriebelkrankheit (Germany, 1672–75), Rafania (Sweden, 1754–57), and nona (Italy, 1890–91). Further, in 1921 Urechia proposed that the initial appearance of encephalitis lethargica during the epidemic period was in early 1915 rather than 1916, and most likely in Romania. The movement of troops across Europe during World War I likely facilitated the spread of encephalitis lethargica, which reached epidemic status in Vienna in 1917, followed by France and England in 1918. By 1919, the epidemic had overrun most of Europe, the USA, Canada, Central America, and India. During the epidemic period, peaks of encephalitis lethargica occurred in 1920 and 1924. Subsequently, acute cases became less common, although many patients suffered chronic neurological sequelae that persisted long after the epidemic period. There has been no epidemic recurrence of encephalitis lethargica since the early 20th century, but putative sporadic cases continue to occur.

The number of people worldwide who contracted encephalitis lethargica during the epidemic period is unknown, although the highest estimate puts the figure at more than one million (Ravenholt and Foege, 1982).

https://academic.oup.com/brain/article/140/8/2246/3970828

Encephalitis Lethargica: Symptoms and Risks

Encephalitis lethargica is a rare neurological disorder that primarily affects the brain. It can have a significant impact on a person's overall well-being, causing a range of physical and cognitive challenges. Individuals with this condition may experience a decline in their quality of life due to the symptoms and complications associated with encephalitis lethargica. It is important for individuals with this condition to receive appropriate medical care and support to manage its effects on their health and daily functioning.
What are the Symptoms of Encephalitis Lethargica

Encephalitis lethargica typically presents with a range of symptoms affecting the brain and overall well-being. These symptoms can vary in severity and may impact various bodily functions. It is essential to recognize the signs early for proper diagnosis and treatment.

High fever

Headache

Neck stiffness

Fatigue

Muscle weakness

Sensory disturbances

Changes in mental status

Speech difficulties

Movement disorders

https://www.medicoverhospitals.in/diseases/encephalitis-lethargica/

Encephalitis lethargica (EL) is an atypical form of encephalitis. Also known as "von Economo Encephalitis", "sleeping sickness" or "sleepy sickness" (distinct from tsetse fly–transmitted sleeping sickness), it was first described in 1917 by neurologist Constantin von Economo[2][3] and pathologist Jean-René Cruchet.[4] The disease attacks the brain, leaving some victims in a statue-like condition, speechless and motionless.[5] Between 1915 and 1926,[6] an epidemic of encephalitis lethargica spread around the world. The exact number of people infected is unknown, but it is estimated that more than one million people contracted the disease during the epidemic, which directly caused more than 500,000 deaths.[7][8][9] Most of those who survived never recovered their pre-morbid vigor.
Neurologist Constantin von Economo (upper left photo) and EL patients

Signs and symptoms

Encephalitis lethargica is characterized by high fever, sore throat, headache, lethargy, double vision, delayed physical and mental response, sleep inversion and catatonia.[5][10] In severe cases, patients may enter a coma-like state (akinetic mutism).[citation needed] Patients may also experience abnormal eye movements ("oculogyric crises"),[11] Parkinsonism, upper body weakness, muscular pains, tremors, neck rigidity, and behavioral changes including psychosis.[citation needed] Klazomania, a vocal tic involving compulsive screaming, is sometimes present.[12]

Yeah, I know it's wikipedia..:-)

https://en.wikipedia.org/wiki/Encephalitis%20lethargica?ysclid=mkvia8qa0426329867