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.
2010 Cases
| Week Ending | Student New | Student To Date | Faculty/ Staff New | Faculty/ Staff To Date | Other New | Other to Date | Total New | Total To Date |
| Jan 15 | 15 | 708 | 0 | 64 | 0 | 65 | 15 | 837 |
| Jan 8 | 7 | 692 | 0 | 64 | 0 | 65 | 7 | 821 |
No data for week ending 1/1/10 due to campus winter closure.
2009 Cases
| Week Ending | Student New | Student To Date | Faculty/ Staff New | Faculty/ Staff To Date | Other New | Other to Date | Total New | Total To Date |
| Dec 11 | 8 | 682 | 9 | 64 | 0 | 65 | 17 | 811 |
| Dec 4 | 10 | 672 | 0 | 55 | 0 | 65 | 10 | 792 |
| Nov 27 | 26 | 652 | 2 | 55 | 0 | 65 | 28 | 772 |
| Nov 20 | 51 | 618 | 4 | 53 | 0 | 65 | 55 | 736 |
| Nov 13 | 61 | 551 | 18 | 49 | 0 | 65 | 79 | 665 |
| Nov 6 | 79 | 467 | 3 | 31 | 0 | 65 | 82 | 563 |
| Oct 30 | 60 | 369 | 10 | 28 | 0 | 65 | 70 | 462 |
| Oct 23 | 45 | 288 | 2 | 18 | 0 | 65 | 47 | 371 |
| Oct 16 | 34 | 220 | 3 | 16 | 0 | 65 | 37 | 301 |
| Oct 9 | 34 | 167 | 11 | 13 | 0 | 65 | 45 | 245 |
| Oct 2 | 53 | 101 | 0 | 2 | 0 | 65 | 53 | 168 |
| Sep 25 | 18 | 48 | 0 | 2 | 0 | 65 | 18 | 115 |
| Sep 18 | 5 | 30 | 0 | 2 | 0 | 65 | 5 | 97 |
| Sep 11 | 3 | 25 | 0 | 2 | 0 | 65 | 3 | 92 |
| Sep 4 | 2 | 22 | 0 | 2 | 0 | 65 | 2 | 89 |
| Aug 28 | 0 | 20 | 0 | 2 | 0 | 65 | 0 | 87 |
| Aug 21 | 2 | 20 | 0 | 2 | 0 | 65 | 2 | 87 |
| Aug 14 | 2 | 18 | 0 | 2 | 0 | 65 | 2 | 85 |
| Aug 7 | 5 | 16 | 0 | 2 | 15 | 65 | 20 | 83 |
| Jul 30 | 5 | 11 | 0 | 2 | 18 | 50 | 23 | 63 |
| Jul 24 | 3 | 6 | 0 | 2 | 1 | 32 | 4 | 40 |
| Jul 16 | 2 | 3 | 0 | 2 | 8 | 31 | 10 | 36 |
| Jul 10 | 0 | 1 | 0 | 2 | 23 | 23 | 23 | 26 |
| Jul 3 | 1 | 1 | 2 | 2 | 0 | 0 | 3 | 3 |
No data for weeks ending 12/18/09, 12/25/09 due to campus winter closure.
- 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.)