Pfizer Vaccine 12 – 15 years – FAQ

Pfizer Vaccine 12 – 15 years – FAQ

updated 2.12.21
Below are common questions presented to Public Health. If you have any unanswered questions please email Note, the risk-benefit strongly in favour of vaccination for almost all groups is less clear-cut for children (and young people aged 12 to 15 years). Young people and their parents will need to understand potential benefits, potential side effects and the balance between them prior to the decision to proceed with COVID-19 vaccination.

Why are you offering a covid vaccination to 12-15 year olds?

The good news is that most cases of corona virus infection in children result in a milder illness than adults. Ongoing research is showing us that long covid complications are not as common in children as we once thought.

What we do know is that 12-15 year olds can carry the virus and pass this onto household and social contacts. If the household contacts have a long term illness or are elderly then there is a risk that this younger age group could pass on infections to the wider community. This is a specific consideration for Gibraltar where we have a very close-knit community.

We also know that some children are missing school as a result of testing positive for COVID-19.

To try reduce the amount of virus we have still circulating in our community, and the chances of spread to those most vulnerable, we are offering vaccinations to 12-15 year olds.

Read more HERE.

Is the vaccine effective in 1 dose?

The Pfizer mRNA vaccine effectiveness against COVID-19 with partial immunization (≥14 days after first dose but before second dose) is around 80%.

Why are 2 doses now recommended?

The decision to provide children 12 – 15 years a single dose was based on best evidence at the time, in view the risk/ benefits gained. The JCVI now recommended that a second dose of vaccine be offered, after an
interval of 12 weeks. This interval reflects the strong evidence of high levels of protection
against severe disease.

Informed consent is important and  families/ young people are encouraged to read through the information provided prior to taking up the offer of the vaccine.

Will children with an underlying illness be offered additional doses?

In certain cases of severe immunosuppression the JCVI recommended a third primary dose of vaccination; this would need to be discussed with their healthcare provider.

What are the side effects from being vaccinated in this age group?

The most common side effect being reported is having a sore arm at the injections site that normally gets better after a few days.

In the trials that have been running, the most frequently reported wider reactions in participants were tiredness, headache, muscle aches, chills, joint pain and a raised temperature. These symptoms were usually mild to moderate and resolved within a few days after vaccination. If required, treatment with paracetamol-containing products can be used.

Is this vaccine safe for this age group?

It is common to experience minor self-resolving side effects to the vaccine. There have been rare cases of myocarditis or pericarditis (inflammation of the heart) in the younger age groups, namely in boys, after receiving the second dose.
However, on-going studies suggest that fewer cases are seen when the interval between the first and second dose is extended to 12 weeks. Moreover, vaccination results in fewer and more mild symptoms overall when compared to contracting the COVID-19 infection itself.
Public Health Gibraltar will be offering a second dose of the vaccine to those requesting it; continuing to monitor global reports and locally reported side effects, as is done for all vaccination programs.

Should I be concerned about this vaccine and fertility?

COVID-19 vaccination is recommended for everyone 12 years of age and older, including people who are trying to get pregnant now or might become pregnant in the future, as well as their partners.

There is currently no evidence shows that any COVID-19 vaccines cause fertility problems in women or men.

Can anyone not have the vaccine?

The vaccines do not contain any living organism and are safe for the vast majority of people. A small number of people may be ineligible for vaccination including people who have severe allergic reactions to medicines or vaccines.

If my child has had COVID-19 do they still require vaccination?

There is no evidence of any safety concerns from vaccinating individuals with a past history of COVID-19 infection, or with detectable COVID-19 antibody.

Your child may still be vaccinated, but this must be 12 weeks from previous COVID-19 infection (from date of onset of symptoms or date of positive swab). The immunity people get from being vaccinated after having a natural infection is consistently very strong. Getting vaccinated even if you have had COVID-19 means you are more likely to be protected for longer.

Can you catch Covid-19 from the vaccine?

No you cannot catch Covid-19 from the vaccine. But it is possible to have caught Covid-19 in the few days before vaccination and not realise until after you have been vaccinated. It takes a minimum of around 2 weeks after vaccination for your body to create the antibodies you need (to protect you from infection).

If my child misses the vaccine this time round will they be able to catch up later?

Once offered an appointment, it is important all children attend promptly, as there is a very busy schedule. It is even more important that should they be unable to attend the appointment is cancelled so that it can be offered to someone else, and so that the vaccines do not go to waste.

There is no guarantee that if an appointment is missed there will be an allocation later, however, there is the possibility of being added to a future waiting list. Every effort will be made to ensure those eligible who wish to be vaccinated do receive a COVID-19 vaccine.

My child feels unwell, can I delay their vaccination?

There is no reason to postpone vaccination for any minor illnesses, particularly without fever. If your child is acutely unwell, for example on antibiotics for a current chest infection, then vaccination should be postponed until they have fully recovered; this avoids any confusion regarding signs or symptoms that may be considered adverse effects of the vaccine.

Will my child receive a vaccine certificate?

For those who have received 2 doses, yes, the Covid Pass App will need to be downloaded to the mobile phone registered to their GHA account. In some cases this may be a parental mobile number, but if you are not certain about this or wish to update/use your child’s mobile phone number please contact

At present, the single dose is not applicable as proof of full vaccination for travel certification purposes. However, below 18 years old children are not required to be vaccinated for travel purposes anyway.

Has there been any problems related to body organs (e.g. the kidney) after receiving the Covid vaccine?

The COVID-19 pandemic is on-going and research continues to be carried out and guidance updated accordingly. Based on current guidance:

The Green Book states the most common side effects include injection site pain (>80%), fatigue (>60%), and headache (>50%). Muscle pains and chills/ fever are also likely (in 10-20% of cases). Children may also exhibit gastrointestinal symptoms (such as nausea and diarrhoea).

A few short term systemic effects are noted, including fatigue in 4% and headache in 2%. A number of children have experienced myocarditis a few days after vaccination; this seems to affect more males and those under 25 years. However, a US study suggests having Covid-19 could be six times more likely to trigger myocarditis in young men than the vaccine, with a rate of about 450 per million infections.

There appears to be some relationship between the vaccine and sugar regulation within the body (receptors in the pancreas) but the extent to which this plays a role is yet to be determined.

No reports currently indicate any issues with the kidneys.

Generally, medical consensus is that getting vaccinated will produce milder and shorter illness compared to those contracting the virus naturally.

My child is 11 years old and they have received an invitation to be vaccinated, what does it mean if I consent to vaccination?

Currently only children aged 12 years and over are eligible for vaccination. If you child is due to turn 12 within the school academic year they will not be included in the current program but be eligible for the Primary Care Public vaccination program. See the GHA website for more information about registering interest HERE.

Can my child get the COVID-19 vaccine at the same time as any other scheduled vaccines?

COVID-19 vaccines and other vaccines, such as the MMR or influenza vaccine, may be given on the same day. The Shingles vaccine is advised to be taken a week apart from the COVID-19 vaccine. General practice involves time delays and/or variations in the site of vaccination (one arm then another) for differing vaccines given; this helps to identify which vaccine may be involved should any side effects be seen.

Can my child play sports after having the vaccine?

Physical activity may continue after vaccination, though readiness will likely be down to how your individual child feels.

My children have received their one vaccine dose. Does this mean they no longer have to complete pre-departure COVID-19 tests before arrival into Gibraltar?

Pre-departure COVID-19 testing is still required for children aged 12 years and above who are not fully vaccinated (2 doses); note testing requirements are updated alongside circulating variants, cases and history of countries visited (read more HERE).

Lateral flow testing is also required within 24 hours of arrival to Gibraltar for all passengers (irrespective of vaccination status).

Can I attend the vaccination appointment with my child?

Yes. One designated guardian is able to accompany per child if they wish to.

Where can I find out more information?

The decision to offer vaccines to the 12-15 year old age group is exactly that, an offer. It is important that you carefully consider the benefits and risks of taking up the offer of any vaccination as part of the informed consent process. We would encourage you to talk about this together as families and do some reading around of the topic. We have developed a FAQ that includes signposting to additional information that you may find helpful in having these discussions.

Listed below are a range of sources of information that you may find helpful to enable you to do this. Some are quite technical and this is because some families may want to explore information to a greater depth than others. Please do remember that there are sources of misinformation on social media and the internet.

  1. Public Health England leaflet on 12-15 vaccinations
  2. JCVI statement on vaccinations
  3. Green Book chapter on vaccinations (aimed at health professionals as a guide regarding vaccine administration)
  4. World Health Organisation
  5. Long covid study in children

 My child has COVID-19 at present; are they still eligible for vaccination?

Any children who have had to miss their appointment due to a current COVID-19 infection are not eligible for a vaccine at this time – the minimum wait between vaccine and infection is 12 weeks. They will need to wait for the next program to be rolled out.

I am worried that my child may have been missed; what should I do?

If your child has missed their COVID-19 vaccine, please contact the vaccine administration team to find out about further appointments, email

Can I report vaccine side effects?

Yes. Recognised side effect of  vaccines should be reported via the Coronavirus Yellow Card Scheme.

Chapter 8 of the Green Book gives detailed guidance on distinguishing between faints, panic attacks and the signs and symptoms of anaphylaxis.