Tucson researchers following Arizona's COVID-19 trends are bracing against the renewed push for "herd immunity" by the Trump administration. Antibody tests in recent weeks show a statewide positivity rate of about 10%, according to Arizona Department of Health Services data, while University of Arizona public health researcher Joe Gerald finds it closer to 12%. The positivity rate including all tests statewide since the pandemic began is around 7% while UA testing shows it is about 4% in Pima County. Regardless of the exact numbers, this means one thing to Dr. Janko Nikolich-Zugich, head of the University of Arizona's Department of Immunobiology at the University of Arizona College of Medicine: Roughly 90% of Arizonans have not been exposed to the virus, and are therefore vulnerable.

Despite a surge in COVID-19 cases in the state, people still celebrated Halloween on Saturday. In the meantime, health experts are warning big Halloween parties and gatherings could be COVID-19 "super spreaders." Dr. Shad Marvasti with the University of Arizona College of Medicine in Phoenix is interviewed.

Dr. Andrew Weil, founder and director of the Andrew Weil Center for Integrative Medicine at the University of Arizona and chief science officer for Maui Grown Therapies, will give a free online presentation called "Cannabis and the Anti-inflammatory Lifestyle" on Thursday.

Dr. Shad Marvasti, director of public health, prevention and health promotion with the University of Arizona College of Medicine, suggests that people participate in a "trunk or treat"-style Halloween to socially distance.

Continuing coverage: University of Arizona Health Sciences will spearhead efforts to bolster community health outreach and engagement in light of COVID-19 disparities.

The University of Arizona Health Sciences is poised to lead a statewide effort to address health disparities and community health gaps made apparent by the COVID-19 pandemic, according to a University press release emailed to journalists.

The Arizona portion of an 11-state effort, funded by a $12 million federal award, to address the uneven impact of the pandemic on racial and ethnic minority communities will be led by the UArizona Health Sciences.

The University of Arizona has licensed new radio-labeling chemistry for PET contrast agents to startup TheraCea Pharma.

ENR Southwest’s 2020 Best Projects competition drew 74 entries from across Arizona, Nevada and New Mexico. The University of Arizona Health Sciences Innovation Building (HSIB) was selected in the Best Project category. The region’s 18 Best Projects will now advance to the national level, competing with winners from nine other regions to be considered for ENR’s Best of the Best awards.

Continuing coverage: Ginny L. Clements, a breast cancer survivor and longtime supporter of the University of Arizona has given $8.5 million to the University of Arizona Cancer Center to strengthen the center's breast cancer patient care and research programs.