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What is known about new Sputnik V side effects?
The updated instructions for use of the Russian coronavirus vaccine Sputnik V report two new adverse reactions, as well as new data on the effectiveness of the drug.
According to Medportal.ru, some patients may develop osteoarthritis (joint disease) and photophobia after receiving the vaccine. The developers estimate the likelihood of these adverse reactions to occur as "infrequent," that is, they can develop on average in every hundredth or thousandth vaccinated person.
The updated guidelines also clarify the frequency of known adverse reactions. Symptoms such as stuffy nose, stuffy throat, nausea and vomiting are now rated as "very rare," with one in 10,000 vaccinated people experiencing them. In addition, in very rare cases, regional lymph node enlargement, dizziness, headache and fainting may occur.
The paper reports that six months after the vaccine is administered, its overall effectiveness is 70.5%. Antibodies during this period persist in 93.3% of those vaccinated.
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