Vaccine Effectiveness - What Is Happening?

The study looked at waning two dose and three dose effectiveness of the m r and a vaccines against covid 19 associated emergency department and urgent encounters as well as hospitalizations. They used what we call a test negative case control study design, using data from eight vision network sights. The network analyzed 200 forty one thousand emergency department or urgent care encounters and 93 thousand 408 hospitalizations across ten states between august 20 sixth 20 21 and january 20 second 20 22. Vaccine efficacy after both dosed, two indosed, three doses were evaluated.