Vaccines Aren’t 100% Effective in Precluding Infection
Advance cases are anticipated, even when vaccines are highly effective. Understanding these cases helps in maintaining realistic expectations about vaccinations.
What Is an Advance Case?
An advance case occurs when a fully vaccinated person contracts a disease they were vaccinated against. Such cases are not exclusive to COVID-19.
Advance Cases in Context
Advance cases happen at low levels with all vaccinations. For example, they occur in children immunized against varicella (chickenpox) and in adults vaccinated against the flu. During a March 2021 American White House press briefing, the National Institute of Allergy and Infectious Diseases Director explained that advance infections are possible.
“You’ll see advance infections in any vaccination when vaccinating millions and millions of people,” Dr. Fauci said.
Milder Symptoms in Advance Cases
Sarah McCauley, a nurse from Bethlehem, Pennsylvania, experienced an advance case after being vaccinated. “I got my first COVID-19 vaccination on December 23, 2020, and received my second vaccination on January 15, 2021,” McCauley recounts.
She tested positive for COVID-19 on March 30. “I was shocked and surprised that I tested positive, and even a little bit frustrated and worried,” McCauley said. Despite asthma, her symptoms were milder: headaches, body aches, and sinus pain but minimal breathing issues.
“If you experience an advance infection, your symptoms will likely be milder,” McCauley noted. Vaccination often prevents severe illness or hospitalization.
What This Means For You
Even if fully vaccinated against COVID-19, you could contract the virus. However, your symptoms will likely not lead to severe illness. It remains essential to practice safety measures, like masking and distancing, to protect yourself and others.
Boosters Are Available
Vaccines can become less effective against mild or moderate COVID-19 over time as viruses adapt and change. New strains may arise, increasing infection risks. Supporter shots enhance protection and extend its duration. Although not mandatory to remain fully vaccinated, booster doses provide added security.
Stay Conservative
If vaccinated and symptomatic, consult your doctor and get tested before engaging in public activities. Vaccination doesn’t guarantee immunity, so precautions remain vital:
- Wear a mask outdoors in public areas with high transmission rates.
- Practice social distancing.
- Wash hands frequently with soap and warm water for at least 20 seconds.
- Use hand sanitizer when soap and water are unavailable.
- Maintain a healthy lifestyle: eat right, sleep well, stay active, and reduce stress.
“Don’t assume that just because you’re vaccinated, you can’t get COVID-19,” McCauley advises. “Err on the side of caution.”
