- #Covid after effects how to
- #Covid after effects trial
They are a normal part of the vaccination process and people ordinarily recover from such side-effects within a few days. Local and systemic side-effects - which are sometimes also referred to as mild to moderate side-effects - are generally the more common consequences that you can expect after receiving your Covid-19 jab.
App data found that less than 15% of participants reported fatigue after the second dose (compared to 51-59% in the trial). COVID Symptom Study App data found that less than 30% of app users complained of injection-site pain (compared to 71-83% in the trial), and less than 25% of fatigue (compared to 34-37% in the trial) and headache (compared to 25-42% in the trial) after the first dose. 
After the second dose, 51-59% of participants reported fatigue. #Covid after effects trial
After the first dose of the jab, 71-83% of the trial participants reported pain at the injection site 34-47% reported fatigue and 25-42% a headache. 21 720 participants in the Pfizer phase three clinical trial (this is the final phase of the study which tested the safety and efficacy of the jab) received two shots each, three weeks apart. This included 345 280 users who received a first dose of the AstraZeneca jab, 282 103 users who got their first dose of the Pfizer jab and 28 207 users who got a second shot of the Pfizer vaccine.īecause South Africa will be using the Pfizer jab, we’re showing you how the trial data of this jab compared to that of the COVID Symptom Study App: The COVID Symptom Study App data included 627 383 app users in the UK between December and March. How common were side-effects for the Pfizer vaccine? The study found that fewer side-effects were recorded in the “real world” than under clinical trial settings. About one in four people declared side-effects that affected their whole body, such as nausea, fatigue and diarrhoea. Sixty six percent of the vaccinated people who used the app between December and March reported experiencing local after-effects such as pain, swelling and tenderness at the site of injection. The researchers focused on two types of symptoms: local effects (they occur at the site of injection) and systemic effects (they affect your whole body). So far, this is the largest study investigating the side-effects of Covid-19 jabs outside of a trial setting. The researchers used data from the COVID Symptom Study App, which vaccinated people in the UK can use to report vaccine-related side-effects. Side-effects range from mild to potentially life threatening and some are more common than others.Ī study published in The Lancet in April analysed self-reported side-effects from people in the United Kingdom who received either Pfizer or AstraZeneca jabs. 
So what can you expect after your Covid-19 shot? Sahpra has put several mechanisms, such as an app, a hotline and electronic reporting systems, in place to monitor the safety and efficacy of the shots that will be used in South Africa’s Covid-19 vaccine roll-out. The trial participants are also far fewer (generally in the thousands) than the millions of people who will eventually receive the jab, which means that very rare side-effects are often not picked up during such studies, because not enough people receive the shot for rare adverse events to show up. But the data that can be collected during such studies is limited.įirstly, Sahpra cautions, the studies don’t run for long enough to detect long-term side-effects. Information about a drug or vaccine’s possible side-effects - scientists also refer to this as adverse events - is collected during clinical trials that test the safety and efficacy of a jab. Not experiencing a reaction, however, is normal too. Side-effects are really just a part of your immune system’s natural reaction to a vaccine.Įxperiencing a reaction to vaccination helps signal that your body is building immunity against the virus.
#Covid after effects how to
Once those antibodies have been produced, your body remembers how to make them, and when you’re exposed to the actual, harmful version of the virus, you’re able to fight it off. This “response” consists of your immune system producing antibodies specific to the virus or genetic material that was introduced. Some vaccines, such as those using mRNA technology, like Pfizer’s shot, use man-made genetic material that instructs your body how to defend itself against a particular virus. Your body responds just as if the threat was real - but without you actually getting sick. Most vaccines introduce a harmless version of a particular germ (in the case of Covid-19it’s the SARS-CoV2 virus) into your body that triggers your natural defence mechanisms.
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