The official, who is involved in the swine flu control operations, said: 'Looking at the current pandemic situation in the world and its spread, India is only expected to see a huge surge in the number of infected cases.'

'You have seen students and travellers getting infected in groups. Once we see human clusters getting affected at a time, we will take befitting measures. We are also planning to stop testing of all suspected cases.'

'We will test a few samples from a close-knit human cluster and if 55-60 percent of them are found positive, then the area will be quarantined. The buffer zone rules will be implemented,' the official added.

In the buffer zone, authorities will provide Tamiflu tablets to adults and its liquid formation to children who cannot swallow pills.

'We will not avail Tamiflu over the counters (at chemist shops) but provide them in plenty to infected people either through hospital or directly to the infected clusters,' the official said and explained that over the counter availability will lead to unwanted mass consumption.

'In such a scenario, people may develop drug resistance to Tamiflu. Then the situation will be out of control. We are in talks with private hospitals too.'