The Pan-American Health Organization, the regional arm of the World Health Organization, signals a more than 30 percent spike in measles cases worldwide last year as compared with 2016.
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.
Pakistan, Afghanistan and Nigeria, are the only other countries that suffer from endemic polio, a childhood virus that can cause paralysis or death.
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.
The World Health Organization reports the number of people who contracted measles in Europe in 2017 was four times higher than the year before.
Brazil has launched a campaign to vaccinate more than 23 million people in response to a yellow fever outbreak that has killed more than 200 people, according to the country's Health Ministry.
Large measles outbreaks still inflict parts of Europe, where some people don't get vaccinated.
A Pakistani mother and daughter were killed in the country's southwestern city of Quetta. There was no immediate claim of responsibility for the attack.
The country halts use of Dengvaxia vaccine after French pharma Sanofi says its drug might, in some cases increase risk of severe dengue in recipients not previously infected by the virus.
The country's health minister says the people who vaccinated the children had used unsterilised syringes and were neither qualified nor trained for the immunisation campaign.
Nearly 3,000 suspected cases of meningitis reported in the past few weeks in Nigeria.
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