"We should get ready for the third wave of A/H1N1 virus which is moving from Europe and will affect Iran as well," Vahid Dastjerdi told reporters on Thursday evening.
"The second wave of the virus was controlled in Iran and there haven't been many cases of disease in the country in the past few days," she added.
The senior Iranian health official further warned that the new wave of the virus would be more severe, due to cold weather, press tv reported.
"That's why the Iranian health ministry has taken several measures to train doctors, nurses, paramedics and the general public," she went on to say.
"We have also imported the A/H1N1 flu vaccine and started vaccinating particular groups of patients suffering from special diseases including kidney, thalassemia and cancer," she asserted.
According to Vahid-Dastjerdi, the A/H1N1 flu vaccine might have some side effects as it's a new vaccine in the world.
She also mentioned that no Iranian Hajj pilgrim has been infected with the A/H1N1 virus because they observed the required health tips.
Iranian authorities decided to bar Iranians from participating in the Umrah (minor hajj pilgrimage) during the holy month of Ramadan (the month of September during 2009) in an attempt to contain the spread of the A/H1N1 virus.
According to Iranian health officials, swine flu has so far claimed the lives of 147 Iranians; some 3,762 individuals have tested positive for the A/H1N1 virus across the country.
Developing the symptoms of the A-H1N1 influenza virus, which originated in Mexico, can be prevented by maintaining one's immune system with healthy food choices, sufficient fluid consumption and the washing of one's hands several times a day.