Disneyland measles outbreak

According to the Centers for Disease Control (CDC), the measles was a virus nearly all children obtained by the age of 15. There was an effort to make a vaccine against the measles that had success. to 99% protection from acquiring the disease. Prevention of a measles outbreak requires around 95% of a population to be vaccinated with two doses of a measles vaccine. The few remaining that are unvaccinated or have not mounted an immune response from the measles vaccine, are protected by herd immunity. In 2000, the US declared measles as eliminated due to an effective vaccination programme and public health response systems. Prior to the Disneyland measles outbreak of 2014–15, California saw increasing rates of non-medical vaccine exemptions, sometimes in clusters which left those communities susceptible to measles. ==Outbreak==

from the island in 2014 On January 5, 2015, the California Department of Public Health (CDPH) first heard of a case of measles in a hospitalised 11-year old Californian resident whose rash started on December 28, 2014, and who had visited one of two neighbouring Californian Disney theme parks. Cases linked to the outbreak were reported in Mexico, and in Canada its Public Health Agency reported more than 150 cases of measles that were linked to one imported case from the Disneyland outbreak. 12 cases, included in the unvaccinated total, occurred in infants too young to have the vaccine; they relied on herd immunity for protection. Linked to the California cases were 16 cases in six other US states, 159 cases in a religious group in Québec, Canada, and one case in Mexico. The incident prompted the California Senate Bill 277, laws that reverted the California personal belief vaccine exemption. ==Reaction and aftermath==

Many people thought of measles as a disease of the past, and the Disneyland outbreak came as a surprise to them. Media coverage and social media posts focused on the harms of the "anti-vaxx" movement and resulted in a positive influence in vaccine uptake and the effect was dubbed by some as the "Disneyland effect". One case that year was a person who visited Disneyland. ==See also==