Pfizer CEO Recommends 4th Dose Of COVID Vaccine

Pfizer's CEO, Albert Bourla, states that a fourth dose of the COVID vaccine is necessary to maintain low hospitalization and symptom rates. While the third dose was effective, its efficacy diminishes over time. Pfizer plans to submit data for a fourth dose, and countries like Israel, Chile, and Germany are already recommending it for high-risk groups.

What is Pfizer's plan regarding the submission of data for the fourth vaccine dose?

Which countries have started recommending a fourth dose of the COVID vaccine for high-risk groups?