How many immunizations did the patient with the most prevalent condition that started recently get?
patient with the most prevalent condition refers to patient where MAX(PREVALENCE RATE); started recently refers to MAX(START);
SELECT COUNT(T2.patient) FROM all_prevalences AS T1 INNER JOIN conditions AS T2 ON lower(T1.ITEM) = lower(T2.DESCRIPTION) INNER JOIN immunizations AS T3 ON T2.PATIENT = T3.PATIENT GROUP BY T2.PATIENT ORDER BY T2.START DESC, T1."PREVALENCE RATE" DESC LIMIT 1