Corona virus disease is an infectious disease induced by a family of viruses that can cause common cold and severe acute respiratory syndrome (SARS).This research work was designed to shed light on the different presentation forms, especially the unusual ones of the disease as an attempt to make early diagnosis for better and efficient treatment and prevention of the disease.A sample of 203 subjects who have had corona disease were questioned about the symptoms they were complaining of during the illness. Correlation coefficient study was conducted to declare the relationship between the different symptoms especially the unusual ones and the disease, among the symptoms themselves, certain symptoms with the age group, as well as the gender.The results showed positive correlation between many of the usual symptoms and the disease for instance, fever, headache, cough, dyspnea, malaise, muscle and joint pain, dizziness, loss of smell and appetite, running nose, sore throat, nausea, vomiting, and diarrhea. No significant correlation could be detected with the unusual symptoms like, elevated blood pressure, conjunctival congestion, amnesia, and decreased concentration, skin rash, loss of consciousness, intestinal colic and gastric pain.According to the available results no specific symptom could be attributed to a given age group or gender with the exception of the neurological symptoms in the form of amnesia, loss of consciousness, and decreased concentration. These findings were found to be firmly correlated with the severity of fever. The authors postulate that these symptoms can be attributed to the temporary reduction in the number of neurotransmitters molecules of the brain. Further work is needed to provide evidence in support of this postulation. In conclusion, for early diagnosis and therefore to achieve efficient treatment of corona disease, unusual presentation must be kept in mind. Fever must be delt with seriously and effectively to prevent or minimize the development of neurological symptoms. Using all means of audio, video, and social media to spread the information about the disease will have a crucial role in slowing the spread of the disease especially the new strains.

Keywords— corona disease, neural symptoms, Amnesia, Loss of concentration, Dizziness, and loss of consciousness.

DOI: http://doi.org/10.24086/biohs2022/paper.836