The immunisation, carried out under emergency powers, is a desperate bid to halt measles infection rates that have been inexorably rising since mid-October, with most of the victims young children.
Growing scepticism of vaccines in Europe, especially in countries like France should be a cause for concern.
The motive for the murder in the town of Lwemba in the troubled Ituri region was unknown, but it came as health authorities were set to introduce a new vaccine against the disease in unaffected areas.
The ongoing Ebola outbreak is the second-worst one in history after more than 11,000 people were killed in Guinea, Sierra Leone and Liberia between 2014 and 2016.
A third of French citizens think immunisation is unsafe, according to figures. Globally, 79 percent of people agreed that vaccines are safe and 84 percent said they were effective.
The World Health Organization (WHO) has reported that global measles cases have nearly quadrupled in the first quarter of 2019 to 112,163 cases compared to the same period last year.
Measles was declared officially eliminated from Australia by the World Health Organisation in 2014. But the growing anti-vaccine movement has seen a reemergence of the disease in developed nations including Australia.
Pharmaceutical company Changsheng Bio-technology is under investigation after being accused of falsifying data on rabies vaccines, leaving worried parents eyeing Hong Kong for safer alternatives for their children.
China’s top leaders criticise "shocking" behaviour from a pharmaceutical firm that faked vaccine production and test records. The scandal has sparked anger among citizens fed up with lax controls.
The number of people getting vaccinated in Romania has fallen faster than anywhere in the world and now more than 12,000 are infected with the measles virus across the country.
French drug maker Sanofi had earlier revealed that Dengvaxia - the world's first dengue vaccine might increase the risk of severe disease in people who had never been exposed to the virus.
UNICEF expresses concern over aid distribution in Yemen's Sanaa as the first ship of flour arrived at the country's Hodeidah port after a more than two-week Saudi blockade was lifted.
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