Bird flu in the Philippines, outbreak by outbreak

251 dates since 2017 on which the Philippines told WOAH it had an avian-influenza outbreak. The most recent began June 24, 2026. Every row below carries the WAHIS report it was read from, so you can check any figure here against the country's own notification rather than against a news story about it.

1 of these dates is a wild-bird detection rather than a poultry outbreak (Arctic warbler, Common Redshank). It is labelled rather than dropped, and it is not counted as a poultry outbreak anywhere on this page.

By year

One year carries most of this record. 2022 alone is 52.6% of every reported date, which is worth holding on to before reading any average across the whole span.

WAHIS holds no Philippine outbreak at all for 2018, 2019, 2021. That is a zero in the record, not a gap in it: nothing was reported to WOAH in those years. Whether nothing happened is a different question, and gap G-6 is where this site keeps it.

2026 runs to June 24, 2026 and is not a full year. A +n under a bird count is the number of that year’s reported dates that publish no count at all, so the figure beside it is a floor rather than a total.

When outbreaks happen

February, March, April carry 39.4% of every reported date, and 50.4% once 2022 is taken out. Both are shown below, because 2022 carries so much of the record that a month profile computed over everything is largely a picture of that one year. Neither column is the answer on its own.

The practical reading: the months to tighten biosecurity are the ones before that window, not the ones inside it. Once your area is in an outbreak the decisions left are the LGU’s, not yours.

Where

Region III (Central Luzon) is named on 66.9% of reported dates. 15 regions appear in the record in all, and the concentration is the fact rather than a detail of it: a national figure averaged across the whole country describes nowhere in particular.

A date whose outbreaks spanned two regions is counted under both, so this column sums to more than the number of dates.

Backyard or commercial

WAHIS records the type of each epidemiological unit and this is the reporting country’s own classification of it.

Treat the backyard label with care. Several units filed as backyard here hold thousands of birds, which is not what the word means to somebody keeping twenty in the bakuran.

Serotype

What was typed, on the dates a type was published. It is here for completeness rather than for a decision: nothing a keeper does about biosecurity changes with the N number.

The record, all 251 dates

Oldest at the bottom. Every row links the WAHIS report it was built from. A date carrying several outbreaks is one row, and the archive note on that row names each unit separately.

The last 20 dates

A retracted row is one this site published and then found to be wrong. It stays here, struck through, with the reason. Retraction is never deletion.

How this was built

• One row per date. WAHIS records outbreaks one per epidemiological unit and several units can share a start date, so where they do, one row carries them all. The date is the WAHIS outbreak start date, never the date the notification arrived.
• WAHIS is the country’s own notification to WOAH, so it is a floor and not a ceiling: it counts birds in flocks that were reported, tested and confirmed. Losses in backyard flocks nobody reported are in no dataset anywhere.
• Last rebuilt from WAHIS on 2026-08-13. The refresh script re-derives every row and compares it field by field against the file before a single new row is written.

Source

• WOAH: World Organisation for Animal Health, WAHIS

The other half of the picture

This page is the outbreak record. What is under restriction right now is a different measurement, taken weekly by the Bureau of Animal Industry, and the two answer different questions.

• Areas still under restriction, weekly
• Areas with an on-going case, weekly