Pfizer, Moderna and AstraZeneca confirm that pork products are not part of their Covid-19 vaccines.
Poorer nations may be left behind as wealthy nations, accounting for just 14 percent of the global population, have pre-ordered just over half of the vaccine doses expected to be produced.
Coronavirus pandemic has interrupted vaccine supply chains and left families fearful of attending clinics, says UNICEF.
With millions suffering from years of war and severely degraded medical facilities, countries at war cannot pay the price of a new frontline.
Growing scepticism of vaccines in Europe, especially in countries like France should be a cause for concern.
Globally, nearly three times as many measles cases were reported from January to July this year than in the same period in 2018, the WHO said.
Resistance to vaccination against the infectious disease and malnutrition are seen as the major contributors towards the largest measles outbreak in the island nation's history.
The World Health Organization is partnering with the Nigerian government to boost vaccinations.
In Europe, there were more than 21,000 cases of measles and 35 deaths last year, a fourfold increase in cases compared to the previous year.
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