Till date, Delhi has been considered as swine flu free state but experts are doubtful that monsoon can cause swine flu in the city. Last week a person was reported dead in Ghaziabad because of swine flu.

Experts have found only two cases of swine flu in Delhi during a month's time but are speculating that monsoon can spread the virus.

Punit Kumar Pruthi, a consultant at the Asian Institute of Medical Science, Faridabad, said that swine flu virus depends upon hot and humid condition for its breeding and all these conditions become available to this virus in monsoon season.

Last year in June 2009, the World Health Organization has announced H1N1 flu as an epidemic.

Following the traces of last year, this year Indian government has already taken few precautionary measures like by introducing its indigenous vaccine for H1N1 flu earlier this month. The vaccine will be manufactured by Zydus Cadila and so far it is not offered in Delhi.

Kailash Gupta of the All Delhi Chemist Association said that up till now no chemist shop is supplying swine flu vaccines.

Health Minister Ghulam Nabi Azad and Cadila Chief Pankaj Patel said during the launch that demand for vaccine is small, but even though the vaccines are not offered by medical stores.

A representative from a chemist shop, Chemico Chemist and Druggists said that although there is no demand for swine flu vaccines so there is no concern for the stocks, although we have Tamiflu which is an antidote for the influenza.

He further told that so far there have been no major cases of swine flu so it is expected that demand will be minimum.

When J. P. Singh, principal secretary (Health) of the Delhi government has been questioned regarding the unavailability of vaccine in the market, he replied that the matter will be looked into and will be thoroughly checked. He also added that all the preparation have been made by the administration to deal with influenza.

Mr. Singh said that separate wards have been constructed in the hospitals for swine flu patients and all the hospitals are ready to face any situation.

The more risk is involved with the situation, when the virus undergoes some alterations and become more powerful, said by the Asian Institute's Pruthi.

He said that this year people will be highly immune against this virus but in case it becomes more severe, then risk will be higher.

He also said that, common swine flu after mutation give rise to H1N1 flu and if the virus further mutate then it can either become milder or more intense.