Luanda, Dec 9 (Prensa Latina) Angola is preparing conditions to start vaccination against Covid-19 in the first quarter of 2021, confirmed the Secretary of State for Public Health Franco Mufinda on Wednesday. Priority will be given to the known risk groups: healthcare professionals and others, whose work demands frequent contact with persons, as well as hypertensive, obese, diabetic, oncological and renal failure patients, elderly and those infected with HIV-AIDS, the expert exemplified on a press briefing.