Reference:
Khan, N. A., Al-Thani, H., & El-Menyar, A. (2022). The emergence of new SARS-CoV-2 variant (Omicron) and increasing calls for COVID-19 vaccine boosters-The debate continues. Travel Medicine and Infectious Disease, 45, 102246. https://doi.org/10.1016/j.tmaid.2021.102246
Summary:
The emergence of the Omicron variant of SARS-CoV-2 has sparked global concern due to its high mutation rate and potential vaccine escape capabilities. Designated as a variant of concern by the WHO, Omicron is linked to significant increases in transmission and breakthrough infections. This situation has intensified discussions around the necessity and timing of COVID-19 vaccine boosters, particularly in wealthier nations where vaccination rates are already high. While studies indicate that booster doses can enhance protection against severe illness, there are growing concerns about equity and the prioritisation of vaccine resources globally. Evidence suggests that while two doses may provide substantial protection against severe disease, their effectiveness against mild infections from Omicron appears diminished. The debate continues over whether booster shots are essential for all populations or if resources could be better allocated to vaccinating unprotected individuals, especially in lower-income countries. Ultimately, the scientific community acknowledges the need for more comprehensive research to inform vaccination strategies in light of Omicron’s emergence.