The World Health Organization says changes to the US childhood vaccination schedule are 'not in line with the best science.'⁣ ⁣ WHO chief Tedros Adhanom Ghebreyesus said delaying or separating vaccine doses could leave children more exposed to infectious diseases, after President Donald Trump signed an executive order calling for fewer childhood vaccinations.⁣ ⁣ #WHO #Vaccines #US #Health #Trump