Hong Kong is set to change its vaccination policy for measles, with children receiving a second injection against the contagious disease at a younger age amid a continuous rise in infections.From next year, children aged 18 months will receive the second jab instead of having to wait until they are six years old under the existing policy.Secretary for Food and Health Professor Sophia Chan Siu-chee also revealed at the Legislative Council on Wednesday that about 30,000 doses of the vaccine would…
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