Common Cold Most common infection Caused by group of viruses called: * Rhinoviruses RNA viruses Virus infects the cells of the Respiratory tract Other viruses that may cause a cold are: * Adenovirus * Coronavirus * Influenza A and B

Virus is spread by droplets from nose and throat from coughs, sneezing or direct contact Person may feel sick from 2 4 days There is no cure or vaccines for cold Treatment of a cold includes relieving the symptoms: * Grandmas chicken soup * Aspirin * Throat lozenges

Known as the FLU Highly contagious infection In the respiratory tract: * Nose * Lungs Named by the proteins on the surface of the virus: H = Haemagglutinin N = Neuraminidase

H5N1 Type/strain of Influenza A Called Avian flu Most wild ducks are the natural carries of the virus How did it end up infecting humans?.......... When poultry, such as chickens and turkeys became infected The virus is found in chicken droppings. Farmers needs to wash their hands

H1N1: Influenza A Normally only infects pigs, but The virus is able to mutate as it travels from host to host for years.. Then, if it happens to infect a human host, it can mutate This is not good! Why?................ Once it mutates in the human host then it can be transmitted from one person to another and our immune system cant fight the virus off

Bird flu remains a threat: (AFP) Mar 24, 2010 Bird flu outbreaks that have killed seven people in several countries so far this year show the virus remains a threat to humans Last week, a three-year-old Vietnamese girl stricken with the virus died of severe lung infection, authorities there said. Fatality rate for humans infected with bird flu remains high at 59 percent

Luckily, we cant get the virus by eating cooked chicken or eggs It has not been proven that the virus can be spread from person to person Most common in Asia and Indonesia No cases have been seen in USA or North America At present time there is no affective vaccine against H5N1. WHY?....... Regular Flu vaccine doesnt work

Known as the Spanish Flu Killed close to 50 million people worldwide Thats more than the Black Death Bubonic Plague from 1347 to 1351 An estimated 675,000 Americans died during the pandemic What is a Pandemic ?........... When an infectious disease spreads worldwide

Origin of the Spanish Flu is not known Interestingly it killed healthy adults, not the usual population such as: * Young children * Elderly * The Sick WHY?.............. Do to their healthy, strong immune system, the the system overreacted to the virus destroying healthy tissues and organs as well

Some Scientists believe that the H1N1 virus of today is the mutated version of the 1918 Flu virus Also, interestingly enough, it was not the virus itself that caused so many deaths, BUT?.......... A secondary bacterial infection in the LUNGS!!! In the past 300 years there have been two other Flu pandemics: 1. The Asian Flu of 1957 2. The Hong Kong Flu of 1968

The word herpein comes from Greek word to creep There are more that 100 herpes viruses but only 8 infect human host Most adults worldwide are infected DNA virus Hidden virus Once infected, it is your buddy for LIFE!!!

HSV 1 HSV 2 HSV-1 infects the cells in the mouth, skin and cornea of the eye HIGHLY CONTAGIOUS - by direct contact Cause cold sores and severe blistering of the skin HSV- 2 is type of STD also Highly contagious

Causes 2 distinct diseases: Chicken pox Varicella * Common in children * In adults it is very serious * Virus remains dormant or Hidden in nerve cells of spinal cord Shingles Herpes zoster * Common in adults * Reactivation of Chicken pox virus * Virus becomes Active again

EBVCauses Mononucleosis or the Kissing DiseaseTransmitted in saliva from person to personVirus infects cells in the mouthNext, virus infects B cells * Type of white blood cells * Virus Hides in B cells More than 90% of people become infected Can cause Cancer: * Burkitts Lymphoma - cancer of B-cells * Nasophyrangeal CA nose and throat

6 strains of Hepatitis virus: * A B C D E and F Only 3 can make us sick: * A B and C Infects the Liver Each type/strain is transmitted differently: * Contaminated food or water * Blood * Sexually /STD Causes Jaundice yellowing of skin and eyes

HVA Type of RNA virus More common in developing countries with poor sanitation Highly contagious found in feces Spreads by eating and drinking contaminated food and water Children have mild or no symptoms * They develop life - long immunity 75 % of adults develop jaundice

HVB DNA virus Close to 400 million are infected world - wide Spread by contaminated blood by drug users sharing needles Body fluids - STD Health care workers 90% of people recover But 10% of people develop chronic hepatitis

HVC RNA virus Mainly spread via contaminated blood 75% of infected people develop Chronic Hepatitis Only 50% of people with chronic hepatitis recover There is no vaccine for HVC Luckily, There is vaccine for HVA and HVB

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