The following is a summary of known/suspected influenza cases* reported on campus since July 2009. This information, compiled weekly, is shared with public health officials in Santa Cruz County and emergency preparedness staff in UC's Office of the President.
* These cases include all influenza-like illness (ILI) — either seasonal or H1N1. Definitive H1N1 testing is currently only performed in cases involving hospitalization.
| Week Ending | Student Cases for Week | Student Cases to Date | Faculty/Staff Cases for Week | Faculty/Staff Cases to Date | Other Cases for Week | Other Cases to Date | Total Cases for Week | Total Cases to Date |
| 11/13/09 | 61 | 551 | 18 | 49 | 0 | 65 | 79 | 665 |
| 11/6/09 | 79 | 467 | 3 | 31 | 0 | 65 | 82 | 563 |
| 10/30/09 | 60 | 369 | 10 | 28 | 0 | 65 | 70 | 462 |
| 10/23/09 | 45 | 288 | 2 | 18 | 0 | 65 | 47 | 371 |
| 10/16/09 | 34 | 220 | 3 | 16 | 0 | 65 | 37 | 301 |
| 10/9/09 | 34 | 167 | 11 | 13 | 0 | 65 | 45 | 245 |
| 10/2/09 | 53 | 101 | 0 | 2 | 0 | 65 | 53 | 168 |
| 9/25/09 | 18 | 48 | 0 | 2 | 0 | 65 | 18 | 115 |
| 9/18/09 | 5 | 30 | 0 | 2 | 0 | 65 | 5 | 97 |
| 9/11/09 | 3 | 25 | 0 | 2 | 0 | 65 | 3 | 92 |
| 9/4/09 | 2 | 22 | 0 | 2 | 0 | 65 | 2 | 89 |
| 8/28/09 | 0 | 20 | 0 | 2 | 0 | 65 | 0 | 87 |
| 8/21/09 | 2 | 20 | 0 | 2 | 0 | 65 | 2 | 87 |
| 8/14/09 | 2 | 18 | 0 | 2 | 0 | 65 | 2 | 85 |
| 8/7/09 | 5 | 16 | 0 | 2 | 15 | 65 | 20 | 83 |
| 7/30/09 | 5 | 11 | 0 | 2 | 18 | 50 | 23 | 63 |
| 7/24/09 | 3 | 6 | 0 | 2 | 1 | 32 | 4 | 40 |
| 7/16/09 | 2 | 3 | 0 | 2 | 8 | 31 | 10 | 36 |
| 7/10/09 | 0 | 1 | 0 | 2 | 23 | 23 | 23 | 26 |
| 7/3/09 | 1 | 1 | 2 | 2 | 0 | 0 | 3 | 3 |
- Student Cases include cases seen at the Student Health Center as well as student contacts via the Student Influenza Advice Line and other identified cases (fire/EMS contact, reports by residential staff, etc.)
- Faculty/Staff Cases include cases reported by units to the campus Emergency Manager and other self-reported cases by faculty/staff.
- Other Cases include cases reported to the campus Emergency Manager involving non-affiliates on campus (camp program participants, dependent children living on campus, etc.)
