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From the vaccine does not provide immediate immunity to coronavirus, more than 200 Israeli citizens They have been diagnosed with the disease within days of receiving the Pfizer / BioNTech vaccine, local media reported.
According to them, it is based on Russian network RT, the number of people who got sick with Covid-19 despite being vaccinated was about 240 people, according to Channel 13 News.
The Pfizer / BioNTech vaccine, on which the Israeli health authorities rely, like most countries in the world at this stage, does not contain coronavirus and therefore cannot infect the vaccinated person. Therefore, it takes time for the genetic code of the drug to “train” the immune system to recognize and attack the disease.
The American vaccine requires two doses. According to studies, immunity to Covid-19 increases only eight to ten days after the first injection and reaches about 50%.
The second dose is given 21 days after the first, and declared immunity of 95% is achieved only one week later. And of course there is still a 5% chance that someone will get infected with the virus. 
Security
The Israeli media that carried the news urged the public to remain vigilant and follow all precautions against Covid-19 during the month following the first vaccine.
The Jewish state is currently conducting a massive vaccination campaign, having already vaccinated 1 million citizens, or more than 10% of its approximately 9.2 million inhabitants.
This is the highest rate in the world, according to the University of Oxford. The first phase of the program aims to vaccinate doctors and the elderly before expanding to other categories.
About one in a thousand people reported mild side effects after the first dose, such as weakness, dizziness, and fever, as well as pain, swelling, or redness at the vaccine site. Only a few dozen of them needed medical help, the Health Ministry said.
Since vaccines began on December 20, at least four people in Israel have died shortly after the injection, state broadcaster Kan reported. However, the Health Ministry said that the deaths of three of the victims were not related to the vaccine, and that a fourth case of an 88-year-old man with pre-existing problems is being investigated.
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