A DELIGHTED Amjad Al Mahari, 24, who became the world’s first sickle cell patient outside the US to successfully complete a milestone treatment with Casgevy, gave the thumbs up to Dr Tedros Adhanom Ghebreyesus during a video call yesterday with the World Health Organisation chief.The Bahraini’s remarkable recovery after the CRISPR-based gene-editing therapy using bone marrow transplantation technology at the Royal Medical Services-Bahrain Oncology Centre was announced by His Royal Highness Prince Salman bin Hamad Al Khalifa, Crown Prince and Prime Minister, last week, as reported by the GDN .