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Significance

Viruses mutate when they multiply and often the changes do not affect their behaviour significantly. However, changes that allow them to infect better, evade immune defences or both may give rise to variants that ensure better survival for the virus, raising questions about the end of the COVID-19 pandemic.

Impacts

Vaccination rates differ between countries and travel may remain disrupted to/from low-vaccination areas.

Vaccine passports may become routine, but may not be a viable solution to protection against new variants and outbreaks.

Vaccine politics may favour immunising majority populations in some countries rather than equitable distribution across the world.

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