Stages of swine flu

Swine flu does not have formal numbered stages, but the illness follows a recognizable course from exposure to recovery. Knowing the timeline helps you judge whether things are going normally.

Phase 1: Incubation (1 to 4 days after exposure)

• The virus multiplies silently; you feel well
• You can already spread the virus a day before symptoms appear - this is why flu moves through families and offices so fast

Phase 2: Sudden onset (days 1 to 2 of illness)

• Fever rises quickly, with chills, body ache, headache, sore throat, and dry cough
• Tiredness can be intense; most people need bed rest
• Best window for antivirals: oseltamivir works best started within 48 hours of symptoms, especially for high-risk patients

Phase 3: Peak (days 2 to 4)

• Fever and symptoms are at their worst, then fever typically begins settling
• Cough may increase as fever falls
• This is the watch period: breathing difficulty, chest pain, or bluish lips usually appear here if complications are coming

Phase 4: Recovery (days 4 to 7)

• Fever resolves, energy returns gradually, and a lingering cough or tiredness fades over 1 to 2 weeks
• Most people are no longer contagious about 5 to 7 days after symptoms started (children longer)

Off the normal course

• Fever that returns after improving, or worsening cough with breathlessness: possible pneumonia or a second bacterial infection - see a doctor the same day
• Symptoms beyond 10 days without improvement: needs evaluation

Contagion timeline at a glance

Infectious from 1 day before symptoms to 5-7 days after: stay home, mask up, and keep distance from high-risk family members through this window.

Ayurvedic view (interpretive): Classical texts chart fevers through stages of rising, peak, and resolution much like this course. The framework is interpretive; return-of-fever and breathing signs are the modern red flags.

Remember: Expect sudden fever and ache, a rough couple of days at the peak, and recovery within a week. The two patterns that break the rule - danger signs at the peak, or fever coming back after improving - both need a doctor.