Demand for next-generation vaccines – Tedros noted earlier that it makes sense to update effective vaccines with developing virus variants.

However, with this strategy, vaccines will always be behind the mutation rate of nCoV.

He said the world needs a universal vaccine to prevent coronavirus strains in general, including current and future strains.

Pfizer on June 29 said it would begin testing the vaccine on humans later this year.

The number of covid-19 infections and deaths has increased in many areas, mainly due to the rapid spread of Omicron’s two sub-strains BA.4 and BA.5.

The World Health Organization (WHO) recorded an 18% increase in the number of nCoV infections in 110 countries, which is at its highest level since April.

The increase was primarily due to the spread of Omicron’s sub-strains BA.4 and BA.5, which had infectious advantages and the ability to effectively evade immunity.