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2. The I in an SIR model
6. Insect vector of plague
12. Mosquito borne disease whose R0 rises with warming
15. False information created with intent to harm
16. Describes diseases that must be reported to health authorities
18. Ranking system that decides what appears in your feed
21. Ongoing systematic collection and analysis of health data
22. The S in an SIR model
24. Type of spatial diffusion that jumps between places
25. The R in an SIR model
27. Addictive drug in cigarettes and vapes
28. Contaminated inanimate object such as a doorknob
29. Time between infection and the first symptoms
30. Agent in the 2001 letters sent through the US mail
32. Constant expected presence of a disease at a steady level
33. Disease passing between animals and humans
36. What you gain with hearing loss
37. Surveillance using a representative sample of providers
40. Disease caused by Yersinia pestis
41. Treponema pallidum infection treated first line with benzathine penicillin
42. Surveillance where providers and labs send reports in
45. Scottish island contaminated for 48 years
46. More cases than expected for a place and time, often a small local cluster
47. Inner ear structure holding the hair cells
48. Type of spatial diffusion spreading outward in rings through contact

1. Climate science idea described as loading the dice
3. The only human disease eradicated, in 1980
4. Substantial rise in cases above what is normally expected
5. Warning people about manipulation techniques before they meet them
7. Conditions that worsen each other, such as TB and diabetes
8. Airborne disease with an R0 of 12 to 18
9. Habit that has overtaken smoking among young New Zealanders
10. Disease caught from animal urine that rose after New Zealand floods
11. Word from the forty day isolation of ships
13. Drug whose misuse drives resistance
14. Disease linked to John Snow and the 1830s epidemics in Britain
17. Interrupting local transmission of measles for 12 months or more
19. Where a pathogen is maintained in nature, such as bats for rabies
20. Living carrier such as a flea or mosquito moving a pathogen between hosts
23. Epidemic with sustained spread across countries, describing geography not severity
26. Bacterium that stops mosquitoes passing on dengue
31. Bacteria surviving a drug that once killed them
34. Whooping cough
35. Protection against a disease, active or passive
38. Permanent worldwide reduction of a disease to zero
39. Information based on reality but used to inflict harm
41. Pressure created when antibiotics kill susceptible bacteria
43. Type of host where a parasite matures and reproduces sexually
44. Ebola species behind the 2026 outbreak in the DRC