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In order to stop the flu, you need to be able to diagnose it quickly, which is why Jim Cramer told viewers of his "Mad Money" TV show on Friday that he likes diagnostic-test maker Quidel ( QDEL), as a play on avian flu.

There's not enough flu vaccine, said Cramer, so a speedy and effective diagnostic tool is paramount in the fight against the flu, said Cramer.

Quidel is profitable and stands a good chance to make a lot of money from its test, said Cramer. Nevertheless, the most important thing Quidel has going for it is the "buzz" that will be sustained "as we keep talking about the flu."

A caller asked if flu concerns might hurt holiday travel, thus making travel companies potential short candidates. Cramer said he didn't believe so as both Priceline.com ( PCLN) and Expedia ( EXPE) recently said the travel business has picked up. Gas prices have turned down, he said, and that trumps flu concerns.

Another caller asked if Yum! Brands ( YUM), which owns Kentucky Fried Chicken, might see slowing growth in China as a result of bird flu. Cramer said as a play on China, he would swap out of Yum! and into Starbucks ( SBUX) regardless of avian flu concerns because Starbucks is "right where Yum! was two years ago" in China, and it has even more growth ahead of it there than Yum! does at this point.

Powering Up

Cramer is bear hunting in Powerwave Technologies ( PWAV). The cell-phone tower antenna and amplifier maker reported a "great" quarter Thursday, said Cramer, and he believes it is just a matter of time before the lone bearish analyst on the stock, Michael Ounjian of Credit Suisse First Boston, and the shorts, which make up about 9% of the company's float, capitulate.

Cramer said Ounjian initiated coverage of Powerwave in June 2004, when the stock was at $7.61, with an underperform rating, which is "genuine Wall Street gibberish for sell," he said. Powerwave closed Friday at $12.66.

Cramer said 2005 consensus EPS estimates for Powerwave are now nearly twice what Ounjian thought they would be. And Ounjian likes Andrew ( ANDW), said Cramer, even though Andrew's cell-phone tower base station business is flat while Powerwave's is up 56% year over year. "Andrew is a joke! Completely messed up," he said.

"This guy's starting to look crazy!" said Cramer.

"Michael Ounjian at CSFB will break when it comes to Powerwave," said Cramer. "When that happens, I see the stock jumping 3 or 4 points because all the shorts will have to cover. You need to be buying the P-wave now," he said, adding that the trade will "most definitely" be over when the analyst, and the shorts, capitulate.

Going to Extremes

Cramer is extremely bullish on "extreme" sports retailer, Zumiez ( ZUMZ). Extreme sports like snowboarding are going mainstream, according to an article in USA Today, and if that's true, said Cramer, Zumiez is the stock you need to own.

Most importantly, Zumiez "stands up to the homework test," he said. The company reported October same-store sales growth of 10% vs. expectations of 5%, said Cramer. Total sales were up 29%, he said.

The company has 164 stores, mostly in the West, but is expanding into the Midwest and the East. It has opened 31 stores so far this year and has four more in the works in the next two months, said Cramer.

With gas prices coming down, Cramer believes people who may have been reluctant to travel very far to ski and snowboard will rethink their plans. "If Zumiez can do this kind of growth in an environment where gas is expensive, just imagine how well it will do as the price of gasoline comes down," he said.

Great Fortune

Fortune Brands ( FO) CEO Norm Wesley joined Cramer by telephone to talk about what's going on in the home improvement market. Two competitors, American Standard ( ASD) and Masco ( MAS) both recently "hit the wall," said Cramer. "But, it looks like Fortune Brands didn't" based on Fortune Brands' earnings report Friday.

"You're taking share, aren't you?" asked Cramer.

"Yeah, we are, Jim," said Wesley. Wesley said his company saw double-digit growth its home category led by cabinets, Moen faucets and entry doors.

"I think it has to be that Fortune is taking share after those numbers," said Cramer.

Cramer asked Wesley about Fortune's acquisition of Maker's Mark.

Wesley said the acquisition was still in the transition phase but that the spirits category is taking market share from beer and is growing at about 3%.

Cramer asked Wesley if the wine market was slowing as rival Constellation Brands ( STZ) had recently indicated.

"We're not, Jim. Our wine business is very strong now," said Wesley. He added that Fortune's wine business tends to be in the higher end more so that Constellation's. "The premium market has grown very strong. ... We're up double digits" in the wine business, he said.

Cramer summed up the interview saying Fortune Brands "is the best of breed now ... because ... Norm Wesley is the best-of-breed CEO."

The stock "is an opportunity under $80," said Cramer. "Below $78, it's a 'mon back.*"

Fortune closed at $79.42 Friday.

Lightning Round

Bullish

Cramer was bullish on Google ( GOOG), Nucor ( NUE), Emerson Electric ( EMR), Rockwell Automation ( ROK), Texas Instruments ( TXN), Advanced Micro Devices ( AMD), PNM Resources ( PNM), Coley Pharmaceutical Group ( COLY), Washington Group International ( WGII), Fluor ( FLR), Jacobs Engineering Group ( JEC), Michael Baker ( BKR), IntraLase ( ILSE), Pinnacle West Capital ( PNW), L-3 Communications ( LLL), Hudson City Bancorp ( HCBK), Allegheny Technologies ( ATI) and Lowe's ( LOW).

Bearish

Cramer was bearish on Pathmark Stores ( PTMK), Symantec ( SYMC), Reliance Steel & Aluminum ( RS), Navistar International ( NAV), Northfield Laboratories ( NFLD), Diodes ( DIOD), Tessera Technologies ( TSRA), Duke Energy ( DUK), Northrop Grumman ( NOC), Unova ( UNA), EMC ( EMC), Sovereign Bancorp ( SOV), Ixia ( XXIA) and Taser ( TASR).

1. Pigs Get Slaughtered 2. It's OK to Pay the Taxes
3. Don't Buy All at Once 4. Buy Damaged Stocks
5. Diversify to Control Risk 6. Do Your Homework
7. Don't Panic 8. Buy Best-of-Breed
9. Defend Some Stocks 10. Don't Bet on Bad Stocks
11. Own Fewer Names 12. Cash Is for Winners
13. No Regrets 14. Expect Corrections
15. Know Bonds 16. Don't Subsidize Losers
17. No Room for Hope 18. Be Flexible
19. Quit When Execs Do 20. Patience Is a Virtue
21. Be a TV Critic 22. When to Wait 30 Days
23. Beware the Hype 24. Explain Your Picks
25. Find the Bull Market

*For all you home-gamers, a 'mon-back opportunity means Cramer would back up the figurative truck and load up on a stock.

James J. Cramer is a director and co-founder of TheStreet.com. He contributes daily market commentary for TheStreet.com's sites and serves as an adviser to the company's CEO. Outside contributing columnists for TheStreet.com and RealMoney.com, including Cramer, may, from time to time, write about stocks in which they have a position. In such cases, appropriate disclosure is made. To see his personal portfolio and find out what trades Cramer will make before he makes them, sign up for ActionAlertsPLUS. While he cannot provide personalized investment advice or recommendations, he invites you to send comments on his column by clicking here. Listen to Cramer's RealMoney Radio show on your computer; just click here. Watch Cramer on "Mad Money" at 6 p.m. ET weeknights on CNBC. Click here to order Cramer's latest book, "Real Money: Sane Investing in an Insane World," click here to get his second book, "You Got Screwed!" and click here to order Cramer's autobiography, "Confessions of a Street Addict."