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We can getting sick after a single dose of vaccine? The day is coming when the mass vaccination also in Europe, with the date set for December 27 and issues related to immunization are also multiplying.
At the moment, the first vaccine available in Italy and Europe will be the candidate of Pfizer and BioNTech, which needs a double dose, about 3-4 weeks apart, as with many other vaccines, but what happens in this time period? Yes it already is immune or you can to get sick? Let’s be clear.
Covid vaccine, can you get sick after a dose?
Can I get sick between the first and second shots of the vaccine? The U.S. Food and Drug Administration (FDA), the body responsible for regulating food products, experimental therapies, and drugs, is in charge of clarity, publishing a series of graphics able to clarify how much protection be able to offer single dose of vaccine.
Until the tenth day after inoculation of the vaccine, no differences arise with those who received the placebo, thus highlighting a vulnerability to the virus. After this period of time, the two curves separate and people treated with the vaccine become less and less vulnerable over time. The FDA document also states that single dose of the Pfizer vaccine is able to guarantee a82% effective within 21 days of the first dose, which increases to 95% after 14 days of the administration of the second.
Basically with a single “There seems to be some protection against Covid-19 after a dose”, which however is not comparable to what you get with a second dose, then after a single administration there is a risk high enough of to be able to contract the disease, which could also turn into a serious course.
Why do you need a double dose?
Many vaccines, including Pfizer’s Covid vaccine, require the administration of a double dose of antidote. The reason is that the first injection, called in slang “priming”, develop a immune response, while the second, call “increase”, the Turn on making it more effective in case it comes into contact with the virus.
In essence, therefore, after the first dose, the body already begins to produce antibodies capable of blocking infection, but with the second dose they are produced in such a quantity that guarantees ahigh protection, thanks to what is called “Memory B cells”. According to studies published so far, it appears that the Covid vaccine is capable of offering aimmunity of at least 8 months.
