CHILLS

Chills are uncommon with a cold.

60% of people who have H1N1 experience chills.

Chills are mild to moderate with the seasonal flu.

TIREDNESS

Tiredness is fairly mild with a cold.

Tiredness is moderate to severe with H1N1.

Tiredness is moderate and more likely referred to as a lack of energy with the seasonal flu.

SNEEZING

Sneezing is commonly present with a cold

Sneezing is not common with H1N1.

Sneezing is common present with the seasonal flu.

SUDDEN SYMPTOMS

Cold symptoms tend to develop over a few days.

H1N1 has a rapid onset within 3-6 hours. H1N1 hits hard and includes sudden symptoms like high fever, aches and pains. Symptoms usually last 4-7 days, depending on the individual. Diarrhea is common.

Symptoms tend to develop over a few days and include flushed face, loss of appetite, dizziness and/or vomiting/nausea.
Symptoms usually last 4-7 days, depending on the individual..
Diarrhea is common.

HEADACHE

A headache is fairly uncommon with a cold.

A headache is very common with H1N1 and present in 80% of cases.

A headache is fairly common with the seasonal flu.

SORE THROAT

Sore throat is commonly present with a cold.

Sore throat is not commonly present with H1N1.

Sore throat is commonly present with the seasonal flu.

CHEST DISCOMFORT

Chest discomfort is mild to moderate with a cold.

Chest discomfort is often severe with H1N1.

Chest discomfort is moderate with the seasonal flu.
If it turns severe seek medical attention immediately!

статья Комаровского
http://www.komarovskiy.net/blog/svinoy-gripp.html