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Total lockdown us
Total lockdown us









total lockdown us

For example, herd immunity against measles requires about 95% of a population to be vaccinated. The percentage of people who need to be immune in order to achieve herd immunity varies with each disease. Read our Q&A on vaccines and immunization for more information. due to health conditions like allergic reactions to the vaccine) safe and protected from the disease. To safely achieve herd immunity against COVID-19, a substantial proportion of a population would need to be vaccinated, lowering the overall amount of virus able to spread in the whole population. One of the aims with working towards herd immunity is to keep vulnerable groups who cannot get vaccinated (e.g. Visit our webpage on COVID-19 and vaccines for more detail.

total lockdown us

Vaccinated people are protected from getting the disease in question and passing on the pathogen, breaking any chains of transmission.

total lockdown us

Vaccines train our immune systems to create proteins that fight disease, known as ‘antibodies’, just as would happen when we are exposed to a disease but – crucially – vaccines work without making us sick. Read the Director-General’s 12 October media briefing speech for more detail. Herd immunity against COVID-19 should be achieved by protecting people through vaccination, not by exposing them to the pathogen that causes the disease. WHO supports achieving 'herd immunity' through vaccination, not by allowing a disease to spread through any segment of the population, as this would result in unnecessary cases and deaths. 'Herd immunity', also known as 'population immunity', is the indirect protection from an infectious disease that happens when a population is immune either through vaccination or immunity developed through previous infection.











Total lockdown us