| A | B |
|---|
| disease | Something is wrong with a body function |
| fomite | Non living object |
| Antigenic drift | Small mutations of the genome |
| communicable | Able to be passed on to another person |
| vaccine | A dead or weakened pathogen used to immunise |
| infection | Entry and multiplication of pathogen inside host |
| Period of illness | When signs and symptoms appear |
| asymptomatic | Without symptoms |
| Health related event | Any event of health |
| Common vehicle | Transmission through food and water |
| aerosol | Droplet of mucus that can be inhaled |
| predisposing | susceptibility |
| Risk factor | Increases the chances of a disease |
| convalescence | The time to recover from the effects of a disease |
| orthomyxovirus | Influenza virus |
| carrier | Has the pathogen but no symptoms |
| Incubation period | Time between infection and symptoms |
| pathogen | Disease causing organism |
| pathogenicity | Increases the ability to cause disease |
| vector | Transmission by insect bite |
| hemagglutinin | Spike on an influenza virus |
| host | An infected person |
| reservoir | Place where a pathogen spreads from |
| Direct contact | Transmission by touching |
| Confined space | Environmental risk factor |
