Officials in Sri Lanka are reporting that at least 22 people have died in the past two months from swine flu.
The current outbreak, the second since 2009 has affected more than 370 people since late September.
Authorities, however, say there is no cause for panic and the virus is less potent than the first wave.
An immunisation drive has been launched for high-risk groups, including pregnant women, health-care workers and those already suffering from chronic illnesses.
The authorities are also vaccinating the large number of pilgrims visiting a famous shrine in south-eastern Sri Lanka.