The world's largest annual cancer research conference is currently underway in Chicago.

With more than 37,000 in attendance, the ASCO (American Society of Clinical Oncology) conference is a place where health care professionals and industry leaders alike present their latest breakthroughs.

After a rocky start to the year, both the Healthcare ETF XLV and the Biotech Index IBB have rallied over the past month.

The "Halftime Report" experts debated the most attractive names in the sector.

Trader disclosure: On June 6, 2016 the following stocks and commodities mentioned or intended to be mentioned on CNBC's "Halftime Report" were owned by the "Halftime Report" traders:

Josh Brown: Long AAPL, CORE, DE, DNKN, GE, LNKD, SAM, SHAK, TWTR, XLE

Pete Najarian: Long AAPL, BAC, BMY, CSCO, DIS, DISCA, GE, KMI, KMI.A, KO, LUX, MRK, PEP, PFE, SAVE, VIAB, ZIOP. Long calls: AAL, ABBV, AKS, AMJ, BAC, C, CSCO, CSX, DAL, EGO, EWZ, GLW, GS, GSAT, HBAN, KGC, LLY, M, MDLZ, MSFT, MT, MU, NLNK, P, POT, SLV, SVU, TMUS, UAL, X, YHOO. Long puts: BID, FCX, GM, NAV, SCTY, VLO

Joe Terranova: Long BLK, DPZ, FB, IWM, NXPI, ORCL,PNC, VIRT, VRTS

Steve Weiss: Long AAL, AGN, ATVI, BAC, CVC,ENDP, HZNP, SRPT, VXX