The government may order up to two million fewer doses of a swine flu vaccine, when it is invented, to make for a more flexible tender, the health minister says. Officials had planned to buy five million doses for HK$700 million, but would now invite tenders for between three million and six million doses, Secretary for Food and Health York Chow Yat-ngok told legislators on the health services panel yesterday. The tendering process would begin on Friday and a decision would be made by the third quarter, he said. The vaccines would be delivered in November and inoculation would start before the end of December. The minimum of three million doses would cover two million people in high-risk groups - those 65 and above, children aged six months to six years, health care workers and people with pre-existing medical conditions. Dr Chow said the contract would require all vaccines to be first approved by drug agencies in the US and European Union.