After Your Vaccine

Once you have received your vaccination you will need to monitor any symptoms or side effects you may have. 

If my first shot is Pfizer, can my second shot be Moderna?

No, once you take a specific vaccine, your second dose will need to be the same. 

Can I skip my second shot?

No, unless you had a severe allergic reaction to your first dose, the second dose is required to reach its full effectiveness. 

Once I receive my second shot, am I immediately protected?

No, It takes roughly one to two weeks after your second shot to be considered fully vaccinated. 

Once my shot is administered am I allowed to go home?

You will be monitored for roughly 30 minutes after the administration of the shot. 

Why will I need to be monitored?

You will be monitored to make sure you do not have an allergic reaction to any of the ingredients.  

Should I continue to wear my mask and social distance after I am vaccinated?

Yes, as studies continue, it is recommended that masks should continue to be worn as well as continuing proper hand hygiene and social distancing. 


Any vaccine can cause side effects. For the most part, these are minor (for example, a sore arm or low-grade fever) and go away within a few days.  

Adverse reactions are unintended pharmacologic effects that occur when a medication is administered correctly while a side effect is a secondary unwanted effect that occurs due to drug therapy. It is a common misconception that adverse events and side effects are the same things.


In most cases, discomfort from fever or pain is normal. Contact your doctor or healthcare provider:

  • If the redness or tenderness where you got the shot increases after 24 hours
  • If your side effects are worrying you or do not seem to be going away after a few days


1. Contact your healthcare provider.

2. Report an Adverse Event using the VAERS online form or downloadable PDF.

For help with submitting your report, you can call 1-800-822-7967 or email

Important: If you are experiencing a medical emergency, seek immediate assistance from a healthcare provider, or call 9-1-1. CDC and FDA do not provide individual medical treatment, advice, or diagnosis. If you need individual medical or health care advice, consult a qualified healthcare provider.