B10 - supplement

Why are passive immunity short lived?

Passive immunity’s antibodies are not made in the body, meaning it do not create memory cells which the immunity would be short lived

Why do vaccination reduce disease spread?

1. If many people are vaccinated (immune), fewer susceptible hosts are available

2. Therefore pathogen transfer between organisms decreases

3. protecting the individuals who aren’t immune

How can HIV be transferred?

blood, semen, vaginal fluid, breast milk

Describe how to prevent HIV transfer

condoms, testing for HIV, reducing number of sexual partner avoiding sharing needles, sexual education

What happens when there is a cut on the skin?

platelets gather fibrinogen (soluble), converting them into a mesh called fibrin (insoluble), which platelets and red blood cells becomes trapped which blood clot forms.