As swine flu continues its relentless spread around the planet, latest figures show it has killed more than 1,000 people worldwide. In Argentina, deaths have more than doubled in the space of two weeks.Pregnant women and the young are particularly at risk from the virus. The World Health Organisation says HIN1 has infected more than 162,000 people and killed 1,154. But, given that countries are no longer required to test and report individual cases, the WHO acknowledges that its statistics on infections understate the real number. More than ever, the race is on to find a vaccine to contain the spread of swine flu. Big pharmaceutical companies are stepping up clinical trials, with mass vaccinations expected to start from next month. Today, in Geneva, the WHO is set to outline how vaccines for the pandemic are progressing.