Indonesian Deputy Trade Minister Bayu Krisnamurthi said on Monday that the new strain of bird flu H7N9 has not entered Indonesia, but the country is on alert over possible spread of the virus and keeps monitoring the development of the disease.

Indonesia has had experience of being hit, the hardest, by avian influenza, H5N1 virus, which has killed 160 people out of 192 infected since 2005.

"Until now, there is no impact of (H7N9) based on report of WHO. But we have to be alert and we will watch closely the development of the virus," he said on the sidelines of a business meeting at JS Luwansa hotel.

The deputy minister said that cooperation with the agency in charge of animal disease had been carried out to investigate imported products.

Indonesia has just manufactured over 10 million bird flu vaccines to halt spread of a new strain of bird flu that has attacked ducks in main Java Island and killed hundreds of thousands of them, Indonesian Agriculture Minister Suswono Arsyaf has told Xinhua.

At the end of last year, Indonesian experts found a new strain of H5N1 virus on duck, which is more virulent.