Shortly after vaccines became available, some vaccinated individuals were still contracting Covid-19. These were called “breakthrough cases” or “breakthrough infections.”
Concerning breakthrough cases, the Centers for Disease Control and Prevention (CDC) says: “Some people who are vaccinated against COVID-19 will still get sick and have a vaccine breakthrough infection because no vaccine is 100% effective.”
Social Media Trends as of April 27, 2022
Facebook #breakthroughcase: people are posting about this
Instagram #breakthroughcase: 285 posts
TikTok #breakthroughcase: 7.8 million views
YouTube #breakthroughcase: less than 100 videos and channels
Google Trends: “breakthrough case” started to appear during the week of February 7, 2021 reaching its peak during the week of August 8, 2021. A second spike in activity was reached during the week of December 19, 2021 when the Omicron variant was the dominant strain.
Sources:
“Breakthrough case.” Google Trends. URL: https://trends.google.com/trends/explore?date=2019-11-30%202022-03-14&geo=US&q=%22breakthrough%20case%22.
“COVID-19 Vaccines are Effective.” Centers for Disease Control and Prevention. Dec 23, 2021. URL: https://www.cdc.gov/coronavirus/2019-ncov/vaccines/effectiveness/index.html.