Letters warning of vaccine underdosing go to wrong Oakland residents, raising more concerns By Lisa Fernandez and Cristina Rendon Published Letters warning of vaccine underdosing go to wrong Oakland residents, raising more concerns An unknown number of people who got vaccinated at Eastmont Mall in Oakland say they got a letter that they were underdosed. But it appears as though the letter was sent by mistake. OAKLAND, Calif. - Kishore Parwani is one of an unknown number of people who received a letter from the state health department -- apparently by mistake -- alerting him that he may have received a less-than-optimal dose of Pfizer vaccine on March 1 at the Oakland Coliseum.