Modern women often need to diagnose pregnancy as soon as possible. Going to the doctor and the ultrasound examination procedure requires a woman to spend additional time and money. Besides, the ultrasound method can diagnose pregnancy only five days after the delay, and doctor examinations can diagnose pregnancy starting from the 5th week of pregnancy.

Rotavirus infection or rotavirus is an infectious disease affecting the mucous membranes of the oropharynx and small intestine. This is mainly a disease of children aged six months to 4-5 years. But adults can also get sick. The disease usually proceeds in a mild form with erased symptoms. The incubation period lasts an average of 2-3 days.

Rotavirus infection is characterized by an acute onset: a sharp increase in body temperature, nausea, pain and rumbling in the stomach, and intense diarrhoea of bright yellow colour. Rotavirus infection is often mistaken for Acute respiratory infection (ARI) because of a runny nose and sore throat symptoms.

Acetonemic syndrome is a set of symptoms caused by the growth of the quantity of ketone bodies (acetone) in the blood because of the metabolic disorders of carbohydrate and fat metabolism in organisms.

Most often, this syndrome can be found in children of any age, but more often, it is observed in children aged 1 to 13 years (more often in girls). This pathology is not an independent disease. It is a symptom that can accompany the primary disease.

In modern society, the problem of drug addiction is becoming more and more relevant. According to the UN Office on Drugs and Crime, the number of drug addicts in Ukraine is growing by almost 8% of the total number of drug-addicted individuals annually and already has crossed the one million mark. Of particular concern is the fact that more than 71% of registered drug addicts are minors and young people with an average age of up to 25 years.

HIV infection is a dangerous infectious disease that affects the immune system, disrupts the body's protective functions and gradually makes it defenceless against other infections and diseases.

In the early stages of HIV, there are no symptoms, but some clinical symptoms appear that may indicate the presence of HIV. In some cases, they are similar to the symptoms of ARVI:  fever or diarrhoea without an evident cause that lasts for more than a month, muscle and joint pain, rash, sore throat and mouth ulcers, enlarged lymph nodes, weight loss, impaired kidney function, rapid decline visual acuity and other signs. It is worth paying attention to them if, before the appearance of such symptoms, you had unprotected sex or contact with another person's blood.

The only way to know if you have the virus is to pass the test. A blood test shows the presence of HIV 3 months after infection. Before that, there is an incubation period. During such an incubation period, antibodies can not be detected by rapid tests, but a person can already transmit the virus to others.

Hepatitis is a viral inflammatory disease of the liver. Viral hepatitis B and C are dangerous infections characterized mainly by a chronic course and bright external manifestations in the form of jaundice. These viruses are the most common cause of cirrhosis and liver cancer (96% of all deaths are related to viral hepatitis B and C).

The incubation period of this disease is quite long and often has a hidden course, so the first symptoms may not appear immediately. General symptoms of hepatitis of all types: weakness and rapid fatigue, irritability or apathy, disorders from the gastrointestinal tract - nausea, vomiting, abdominal pain and diarrhoea, darkening of urine, discolouration of faeces, yellowing of the skin, mucous membranes and sclera, and elevated body temperature.

Do not forget that the course of the disease may differ depending on the type of virus. 

Helicobacter pylori is a spiral-shaped bacterium that resides in the stomach lining and is capable of surviving in the aggressive acidic environment due to specialized enzymes that neutralize the surrounding acid. This bacterium is the primary cause of chronic gastritis and peptic ulcers of stomach and duodenum. Additionally, it is associated with an increased risk of developing stomach cancer. Infection with Helicobacter pylori occurs through water, food, or contact with contaminated surfaces, objects, and infected peoples.

The infection can present with abdominal pain, nausea, bloating, heartburn and occasionally loss of appetite or weight. Various methods are used for diagnostic, such as the breath test, blood test for antibodies, stool antigen test and biopsy during endoscopy

Streptococcal pharyngitis (Strep A) is an acute infectious disease caused by the bacterium Streptococcus pyogenes, also known as Group A Streptococcus. This bacterium most commonly affects the throat and tonsils, causing sore throat, fever, swelling, and redness of the pharynx. The infection spreads through airborne droplets, with the source being peoples suffering from tonsillitis, scarlet fever, or other clinical forms of respiratory or skin streptococcal infection. This makes it highly contagious, especially among children aged 5 to 15, and least common in adults over 45 years old.

If streptococcal pharyngitis is left untreated, it can lead to serious complications such as rheumatism which affects the heart, joints, and nervous system, as well to peritonsillar abscess—a collection of pus around the tonsils. There is also a risk of developing glomerulonephritis—a kidney disease. To prevent complications, streptococcal pharyngitis is typically treated with antibiotics which help alleviate symptoms quickly and reduce the risk of spreading the infection.