Flu Season in Ireland 2026 — Symptoms, Treatment, and the Vaccine

A clear flu guide for Ireland in 2026: symptoms, when to consult, antivirals, and who should get the vaccine.

By Dr Fatima Farooq · IMC-registered Online Doctor

Flu vs cold

Flu typically hits hard and fast: high fever, severe muscle aches, headache, dry cough, and exhaustion. Colds are gradual: runny nose, sneezing, mild cough, and rarely a high fever.

Treatment

Rest, fluids, paracetamol or ibuprofen for fever
Stay home — flu is most contagious in the first 3–4 days
Antivirals (oseltamivir / Tamiflu) — useful when started within 48 hours, particularly for high-risk groups

The flu vaccine

Free in Ireland in 2026 for over-65s, pregnant women, healthcare workers, those with chronic conditions, and children aged 2–17 (nasal spray). Available at pharmacies and via your usual treating doctor.

When to consult an Online Doctor

If you are in a high-risk group, started symptoms in the last 48 hours, or are unsure whether antivirals are appropriate, consult quickly. Most healthy adults recover with rest and OTC symptomatic care.

Red flags

Attend ED for: severe shortness of breath, chest pain, confusion, persistent vomiting, blue lips, fever with severe headache and neck stiffness, or any baby under 3 months with fever.

FAQs

Should I take Tamiflu?

For high-risk patients within 48 hours of symptom onset — usually yes. For healthy adults, supportive care alone is often enough.

Can an Online Doctor prescribe antivirals?

Yes for typical flu within the time window in suitable patients.

How long is flu contagious?

Most contagious days 1–3; up to a week.

When can I return to work?

When fever has been gone for 24 hours without paracetamol.

Cost?

€34.99.

Speak to an Online Doctor

Same-day video and phone consultations across Ireland, €34.99.

Book a consultation