Most people know that peak flu season starts around November (in the northern hemisphere) and March (in the southern hemisphere) every year. What you may not know is that your annual ‘flu jab’ is made up of three or even four distinct strains of the flu virus (or ‘components’), determined each year by the World Health Organisation to pose the greatest risk to human health.
With the declaration for the northern hemisphere vaccine components only coming in February (and for the southern hemisphere in September) it’s a race from that point on to develop, manufacture and deliver the required vaccine, in sufficient quantities and in time to prevent people getting sick.
With so many component parts involved, and so much pressure to deliver on time, the manufacturing process has to be incredibly flexible and adaptable. It requires a stable, reliable source capable of adapting to the demands of the ever-changing virus strains. And, although you might not think so from that crusty exterior, these are some of the egg’s strongest attributes.