No. Flu is more than just a bad cold. It is caused by a different group of viruses. Symptoms of flu tend to be much more severe and last for longer. They can include high temperature, tiredness, sore throat and general aches and pains.
No. Despite some popular beliefs, a flu vaccine cannot give you flu, as it doesn't contain the active virus. You may experience a low-grade fever and tiredness lasting a few days, however this is common after many vaccines.
Not necessarily. Firstly, this year's flu strain might be a different strain to last year's, so you may need a different vaccine targeted against the new circulating strains. Secondly, your body's immune response declines over time. Therefore, Australian health authorities recommend flu vaccination every year.
No. You can catch flu at any time.