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VACCINES - Coggle Diagram
VACCINES
Under Research
DNA Vaccines
CHARACTERISTICS
- Dispense will all the unnecessary parts of bacterium / virus
- Injection of a few parts of the pathogen DNA
- Instruct the immune system to produce antigens by itself.
DISADVANTAGES
- Limited to protein immunogens
- Risk of affecting genes controlling growth
- Might induces antibody that against production of DNA
ADVANTAGES
- Stimulate the humoral and cellular arms of the adaptive immune system
- Cost-effectiveness
- Stability for storage and shipping
- Ease of development and production
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Approved Vaccines
Subunit Vaccines
CHARACTERISTICS
1.Made from antigens that best stimulate the immune system.
- Only take the best antigen to insert into the vaccine.
ADVANTAGES
- The chances of adverse reactions to the vaccine is lower.
DISADVANTAGES
- Taking a long time to determine the best antigen that available in the patogen.
EXAMPLES
- Hepatitis B
2.Pneumococcal
- Human Papilomavirus (HPV)
Inactivated Vaccines
CHARACTERISTICS
- Virus / Bacteria is killed through radiation, heat or chemicals
- Those dead microb will be injected inside human body
- The immune system will learn the dead microb and build defense system to fight against the disease.
ADVANTAGES
- Easily stored
- The risk of the virus / bacteria mutating back into
disease causing form is zero.
- Can be freeze dried
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DISADVANTAGES
- Less accurate as a simulation for body
- Need to take additional dose or booster doses
Live, Attenuated Vaccines
ADVANTAGES
- Excellent stimulatiom for the immune system
- More long lasting compared the rest of the vaccines
(1 dose or 2 dose)
CHARACTERISTICS
- Living virus or bacteria but weakened
- The pathogen slightly lost the ability to spread the diseases
- Give an exposure to the immune system (to encounter
the disease if the host is infected)
DISADVANTAGES
- They can be violent and spread the disease.
- People who have weakened immune system
such as cancer patients and have HIV, will
have the risk of the pathogen could get stronger
if they take live, attenuated vaccines.
EXAMPLES
- Measles
- Rubella
- Influenza
Toxoid Vaccines
CHARACTERISTICS
- The toxins that secreted by some bacteria
- The toxins is detoxified using a mixture of formaldehyde and sterilized water.
- Immune system will learn the presence of these dead toxins to fight off living toxins.
ADVANTAGES
- No chances for reversion to virulence.
- The antigens are not actively multiplying, thus no spread action of disease.
- Stable and long lasting ( less sensitive towards the changes of temperature, humidity and light intensity )
DISADVANTAGES
- Need an adjuvant and require several doses
- Local reactions at the vaccine site are more common
EXAMPLES
- Diphtheria
- Tetanus
- Cholera
Conjugate Vaccines
CHARACTERISTICS
- A linkage between disguised bacteria ( pathogen that has polysaccharides coating to confuse the immune system ) and antigen from recognisable pathogen.
ADVANTAGES
- Infants’ immune system can recognise the disguised pathogen and learn as future reference
DISADVANTAGES
- The lack of protective immune response in young children
EXAMPLES
- Haemophilus Influenzae Type B
- Streptococcus pneumoniae