The usage of Covid-19 vaccines is often coupled with side effects. A few countries have recently suspended or limited the administrations of jabs made by AstraZeneca. The main concerns were linked to suspected appearance of blood clots after the administration of the vaccine. British regulators said they have identified 30 cases of rare blood clot events after the use of the AstraZeneca Covid-19 vaccine, Reuters reported. That is 25 more than the agency previously reported.