Sniffer dogs at airports during Covid-19

7. something given in exchange for good behaviour or good work, etc
8. Something that is distinctive is easy to recognize because it is different from other things.
9. of the present time
10. any feeling of illness or physical or mental change that is caused by a particular disease
12. to know someone or something because you have seen or heard him or her or experienced it before
14. a test, usually over a limited period of time, to discover how effective or suitable something or someone is

1. a condition in which bacteria or viruses that cause disease have entered the body
2. one or more reasons for believing that something is or is not true
3. to support or improve something or make it stronger
4. any stage in a series of events or in a process of development
5. Someone or something that is reliable can be trusted or believed because he, she, or it works or behaves well in the way you expect.
6. being the only existing one of its type or, more generally, unusual, or special in some way
10. a natural smell
11. to give something, especially money, in order to provide or achieve something together with other people
13. to put a mark on something so it can be found easily among other similar things