The year 2021 marked a crucial turning point in the global fight against the Covid-19 pandemic thanks to the massive deployment of vaccines. These scientific innovations have helped control the spread of the virus, saving millions of lives. This article reviews the major advances made in the field of Covid-19 vaccines in 2021 and the significant impact of vaccination campaigns on public health.
Major advances in Covid-19 vaccines in 2021
In 2021, several vaccines against Covid-19 were developed, licensed and distributed on an unprecedented scale. Messenger RNA vaccines such as Pfizer-BioNTech and Moderna have demonstrated high efficacy, sometimes greater than 90%, against severe forms of the virus. At the same time, viral vector vaccines such as AstraZeneca and Johnson & Johnson have provided valuable alternatives, especially in countries where the storage of messenger RNA vaccines is more complex. The year also saw the appearance of vaccines adapted to emerging variants, demonstrating the reactivity of laboratories to the evolution of the virus. This progress has been achieved through unprecedented international collaboration between scientists, governments and industry, thus accelerating the processes of research and regulatory validation.
Impact of vaccination campaigns on public health
The massive deployment of vaccination campaigns in 2021 had a tangible impact on global public health. In many countries, vaccination has resulted in a significant reduction in hospitalizations and Covid-19-related deaths, thereby reducing pressure on often overburdened health systems. In addition, vaccination has helped to limit the active circulation of the virus, hindering the occurrence of new variants. This success has also led to the gradual reopening of economies and a return to social normality. However, inequalities in access to vaccines remain between rich and low-income countries, a major challenge that international actors continue to address in order to strengthen overall immunization coverage.
The year 2021 will remain a historic step in the fight against Covid-19 thanks to the remarkable advances of vaccines and their massive deployment. These advances not only saved millions of lives, but also paved the way for better management of future health crises. However, it remains essential to continue efforts to ensure a global level of equitable immunization and thereby consolidate the gains made in the face of this pandemic.
