Which of the following is an internal line of defense against pathogens?
Internal Defenses. When pathogens enter the body, the innate immune system responds with a variety of internal defenses. These include the inflammatory response, phagocytosis, natural killer cells, and the complement system. White blood cells in the blood and lymph recognize pathogens as foreign to the body.
What are the differences between primary and secondary line of defense?
Primary Immune Response is the reaction of the immune system when it contacts an antigen for the first time. Secondary Immune Response is the reaction of the immune system when it contacts an antigen for the second and subsequent times.
How does the immune system respond to vaccines?
Your immune system reacts to the vaccine in a similar way that it would if it were being invaded by the disease — by making antibodies. The antibodies destroy the vaccine germs just as they would the disease germs — like a training exercise. Then they stay in your body, giving you immunity.
What are the six killer diseases?
These six are the target diseases of WHO’s Expanded Programme on Immuni- zation (EPI), and of UNICEF’s Univer- sal Childhood Immunization (UCI); measles, poliomyelitis, diphtheria, pertussis (whooping cough), tetanus and tuberculosis.
What are killer diseases?
A handful of deadly infectious diseases, especially in low-income countries, claim millions of lives worldwide each year: lower respiratory tract infections, diarrheal diseases, HIV/AIDS, tuberculosis, and malaria. Together, they account for more than one in eight deaths globally.
What are the symptoms of the major vaccine preventable diseases?
Fever is present in all forms of Hib disease. The most common type of Hib disease is meningitis; symptoms include stiff neck, headache, vomiting and loss of alertness. Other types of Hib disease can cause difficulty breathing and swal- lowing, cough, sore throat, chest pain and headache.
How many people die every year from vaccine-preventable diseases?
Immunizations currently prevent 2 million to 3 million deaths every year. Despite this success, more than 1.5 million people worldwide die from vaccine-preventable diseases each year.
How many vaccines for viruses are there?
There are about 20 safe and effective viral vaccines available for use throughout the world.