World Health Organization (WHO) influenza experts select the influenza strains for the southern hemisphere season each year. Their selection is usually accurate but it is never entirely possible to know what strains will circulate until well into the season.
Flu is not the same as a common cold, and can be a serious illness.
For some people, such as young children, the elderly and those with underlying medical conditions, the flu can cause serious complications requiring hospitalisation and can sometimes lead to death.
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