This document discusses viral infections, including what causes them, common symptoms, and treatment options. A viral infection occurs when a virus enters the body's cells and uses them to replicate. If the immune system cannot fight it off, the virus spreads throughout the body. Typical symptoms include flu-like symptoms as well as rashes, diarrhea, and swollen lymph nodes. While antibiotics are ineffective, treatment focuses on relieving symptoms through rest, hydration, and over-the-counter pain relievers. The document also lists some of the most common viral diseases such as the common cold, influenza, chickenpox, and hepatitis.

1. VIRAL INFECTION

2. infection caused by the presence of a virus
in the body. Depending on the virus and
the person's state of health various
viruses can infect almost any type of body
tissue, from the brain to the skin
viral infections cannot be treated with
typical antibiotics .The vast majority of
human viral infections can be effectively
fought by the body‘s own immune sysem.

3. What causes viral diseases?
Viral infections occur when a virus enters the body and invades the
inside of the body’s cells in order to reproduce. If the body’s immune
system is unable to fight off the virus, it multiplies and spreads to
other cells, repeating the process and leading to a widespread
infection.
Types of viruses :
There are many types of viruses that cause a wide variety of viral
infections or viral diseases.

4. What are the symptoms of viral
diseases ? Flu-like symptoms (fatigue, fever, sore throat,
headache, cough, aches and pains)
 Gastrointestinal disorders, such as diarrhea,
nausea and vomiting
 Irritability
 Malaise (general ill feeling)
 Rash
 Sneezing
 Stuffy nose, nasal congestion, runny nose,
 Swollen lymph nodes
 swollen tonsils
 unexplained weight loss

5. How are viral diseases treated?
Treatment of viral infections varies depending on the
specific virus and other factors. General treatment
measures are aimed at relieving your symptoms so
that you can get the rest you need to keep up your
strength and recover without developing
complications.
General treatments for viral infections include:
• Acetaminophen (Tylenol) or ibuprofen (Motrin,
Advil) for fever, body aches, and pain
• Drinking extra fluids
• Getting extra rest and sleep
• Maintaining good nutrition

6. Antibiotics don't help when you have a viral infection
and a doctor usually shouldn't prescribe an antibiotic,
because only a small percentage of people with
general complaints like fever and fatigue have a
bacterial infection. bacteria can get used to the
antibiotics and become resistant, so when they're
really needed, threre's a chance they won't be
effective anymore
NOTE

7. Top ten viral diseases

8. 1. Common Cold
Causes: rhinovirus
Means of spread: droplets
Symptoms:
runny or stuffy nose, sore
throat, sneezing, slight
fever
Cough, headache or body
aches, mild tiredness

9. 2. Influenza
Causes: influenza A and B
viruses
Means of spread: droplets
Symptoms:
• dry, hacking cough
• fever or chills
• sore throat
• muscle or body aches,
headache
• stuffy and runny nose
• profound fatigue

10. 3.AIDS
virus type:
Retrovirus(RNA)
Organs Affected:
lymphocytes
Transmission:
contact with fluids,
Sexual contact

11. 4. Chicken Pox
virus type: DNA
Organs Affected:
Skin, Nervous
System
Transmission:
contact, Droplets

12. 5. Measles
virus type: RNA
Organs Affected:
Respiratory Tract, Skin
Transmission:
contact, Droplets

13. 6. Dengue fever
virus type: RNA
Organs Affected: Blood,
Muscles
Transmission: Mosquito
( Aedes Aegypti )

14. 7. Hepatitis A
virus type: RNA
Organs Affected: liver
Transmission:
Food, Water, Contact

15. 8. Hepatitis B
virus type: DNA
Organs Affected: liver
Transmission:
Contact with body
Fluids

16. 9. polio
virus type: RNA
Organs Affected:
Intestine, Brain, Spinal
Cord
Transmission:
Food, Water, Contact

17. 10. Rabies
virus type: RNA
Organs Affected: Brain,
Spinal Cord
Transmission: Contact
with body fluids