All drugs – without exception – can determine the appearance of side effects. Some are more visible, others less, but they are still substances that have the peculiarity of inducing a reaction in our body and, consequently, unexpected effects can arise. Therefore, the anti-Covid vaccine is not far behind. However, the second dose appears to cause much more intense adverse effects. Here’s what it is. Covid vaccine, has side effects
The first dose of the anti-Covid vaccine allows the body to produce antibodies against the virus or, more precisely, against the famous Spike protein also known as the S protein. During the second dose, the immune system is strengthened. This means that in younger subjects who have a generally stronger immune system than that of the elderly, the reactions could be much more intense. As underlined by Professor Massimo Andreoni, head of the Tor Vergata Polyclinic and director of the Italian Society of Infectious Diseases, during the second dose the production of memory cells is activated, that is cells that guarantee protection for longer periods.How many people have side effects after the Covid vaccine
Side effects were reported by one in 100 people with the first injection. With the second dose, on the other hand, one case in 10 was reported. The percentage, therefore, is much higher but in line with what was expected by the experts. “EMA, the European regulatory authority also said so: generally with the second dose there are more adverse reactions”, explained to the Republic Stefania Salmaso, biologist expert in vaccines and member of the Italian Association of Epidemiology. Covid vaccine symptoms
Side effects reported during the second dose are: fever up to 39.5-40 degrees. Tiredness, headache, muscle and joint pain, gastrointestinal problems, fatigue and other minor ones such as pain at the injection site. But do not worry: these symptoms – explains Andreoni to the Messenger – generally do not last more than a day and arise between 6 and 24 hours from the administration of the vaccine. It is important to underline that those who have experienced severe reactions during the first dose, for safety reasons, will not be able to have the second injection as well. Such cases, however, are very rare: 3 for every 6 thousand people vaccinated. Because intense reactions occur with the anti-Covid vaccine
As already explained in other articles, the main problem would be due to the fact that they are mRNA vaccines (those of Pfizer and Moderna), which contain lipid polyethylene glycol (PEG) nanoparticles. The latter possess within them the genetic information linked to the Coronavirus Spike protein, therefore of fundamental importance for the effectiveness of the vaccine itself. To make the vaccine, therefore, the main ingredients were combined together in order to obtain tiny balls of fat about a hundred nanometers (that is, the size of the virus) that act as a shuttle. All this allows us to reach the “nucleus” of our cells in order to get the special weapons against the Spike protein to their destination. However,
To summarize, we can say that Moderna and Pfizer vaccines contain a mixture of lipids, salts and sugars that have the specific function of transporting messenger RNA inside our cells. The ingredients of the Pfizer Covid vaccine The Pfizer
vaccine contains the following substances: (4-hydroxybutyl) azanediyl) bis (hexane-6,1-diyl) bis (2-hexyldecanoate); 2 – [(polyethylene glycol) -2000] -N, N-ditetradecylacetamide; 1,2-distearoyl-snglycerol-3-phosphocholine and cholesterol. Those of Moderna’s vaccine are instead SM (sphingomyelin) -102; Polyethylene glycol [PEG] 2000 dimyristyl glycerol [DMG]; 1,2-distearoyl-sn-glycerol-3-phosphocholine [DSPC] and cholesterol, potassium chloride; monobasic potassium phosphate; sodium chloride and dibasic sodium phosphate dihydrate.

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