I’ve been getting many e-mails over the past couple of days concerning swine flu.  So I’ve decided to answer a few of them here.

Dear Dr. Manny,
If I had the swine flu in 1976 after I received the swine flu vaccine as a college student, do I have any anti-bodies that may help ward off this version of the virus?
                  —Amy Gorman
                  Lutherville, MD

Probably not. This current swine flu’s genetic makeup is different from the swine flu from the ‘70s, and therefore the vaccination won’t be protective for you. But the silver lining is that this current swine flu is less lethal, and there may components in it that more Americans have been exposed to. So you may have a greater chance of being protected already which can minimize the symptoms.    

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Dear Dr. Manny,
We have friends who have returned from a trip to Mexico City two weeks ago. How long would it take for swine flu symptoms to show up if they were infected?
Thank you for your time,
—Alan

The typical incubation time for a virus is 48-72 hours.  So if your friends have been back for two weeks, and don’t have any symptoms, you can feel confident that they are safe. 

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Dr. Manny,
My wife and I are very concerned of the complications swine flu/treatment would pose to her pregnancy. Are the approved drugs for treatment approved for use during pregnancy?
Thanks,
Ben Demaline
Jacksonville, FL

Yes, all of the current flu treatments can be given to pregnant women. As a matter of fact, we tend to be more aggressive in treating the flu in expectant mothers because pregnancy can make flu symptoms worse and put the patient at higher risk. That’s why it’s recommended that all pregnant women get flu shots annually.

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Dr. Manny,
I will be flying to Las Vegas next week with a two-hour layover in Atlanta. I had a liver transplant five years ago and have done really well. Do you think that I should wear a mask at the airport and on the plane? I am very concerned about the large crowds and would like your opinion.
Thank you for any answer!
G. Savage

As a liver transplant recipient you are probably taking immunosuppressant therapy drugs and therefore you do have to take precautions to avoid exposure to the swine flu ― or any kind of flu. Even though I’m not a big advocate of wearing masks, I do feel that you should wear one. But remember: Not all facial masks are created equal, so get one that has been proven to protect against viruses. There are many supply stores that carry this specific mask for viruses. Also, try to wipe down all the surfaces on your airplane seat with antibacterial wipes. Be sure to wash your hands before, during and after the trip. And avoid any contact with anyone who you suspect might be sick. I know that this is a big stretch, but until we know exactly the extent of the spread, in your particular case, I would be extra cautious. I hope that this doesn’t ruin your vacation! 

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Dr. Manny,
I have no choice but to commute using public transportation everyday.  How should I take precautions against the swine flu?
                  Thanks,
                  —Paul

If you can avoid public transportation, especially crowded subway cars, then do it.  But if you can’t here’s what you can do:

• If you are a healthy individual you can just use antibacterial products, including wipes and gels, chronically throughout your trip.
• Avoid contact with people who are coughing or appear sick.  If they are in your car, move to another one. 
• As soon as you get home or to the office wash your hands, wipe down your cell phone, iPod or any device that you used during your trip. 

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Dear Dr. Manny,
I’m a chronic nail biter and I’m really concerned about the swine flu.  What should I do?
Best,
                  —Mel

First and foremost — wash your hands. Your hands are the most common tool for picking up germs and viruses in general. So if you are a nail biter, this would be the perfect incentive for you to quit. Also, biting your nails can make you ingest things other than viruses that you don’t want to have in your body.

Dr. Fulbright,
Are there any health risks or hazards associated the oral consumption of semen? Thank you so much and I hope that you have a wonderful day.
Sincerely,
—Zach

Dear Zach,
This is often a matter of debate for lovers, especially since oral sex has been misrepresented as a low risk form of sex. Anytime semen is deposited into the mouth, there is a risk of getting a sexually transmitted infection. Possible infections include gonorrhea, syphilis, HIV, herpes, hepatitis B, human papilloma virus (HPV), and CMV. To reduce the risk of infection, a latex condom should be worn over the penis.

Do you have a question about sex? If so, foxnewshealth.com wants to hear from you! E-mail your questions to drmanny@foxnews.com

Dr. Yvonne Kristín Fulbright is a sex educator, relationship expert, columnist and founder of Sexuality Source Inc. She is the author of several books including, “Touch Me There! A Hands-On Guide to Your Orgasmic Hot Spots.”

Dear Yvonne,
I didn’t ejaculate for three weeks and the color of my fluid is now yellow. Why is that so?
Thank you.
—Wan

Dear Wan,
Changes in the color of semen can be due to a number of factors like your diet, age, and how often you ejaculate. Healthy ejaculate is typically whitish and cloudy, with colored semen indicating a possible prostate infection or sexually transmitted disease.

While the change you describe may be temporary and of no concern, it would be wisest to be medically evaluated to rule out any underlying condition. And always be sure to practice safe sex.

Do you have a question about sex? If so, foxnewshealth.com wants to hear from you! E-mail your questions to drmanny@foxnews.com

Dr. Yvonne Kristín Fulbright is a sex educator, relationship expert, columnist and founder of Sexuality Source Inc. She is the author of several books including, “Touch Me There! A Hands-On Guide to Your Orgasmic Hot Spots.”

Nestle USA is voluntarily recalling all of their Toll House refrigerated cookie dough products today after reports of a possible E. coli outbreak linked to the ingestion of raw cookie dough. The FDA and the CDC are investigating reports of 66 cases of illness across 28 states related to these Toll House products. Now, I’m sure we’ve all indulged in a handful of raw cookie dough at one point or another, but this recall is just another reminder (aside from the WARNING printed on the label) — that it’s not safe to eat until it’s heated!

Because of the popularity of these products, we’ve been getting a lot of questions about E. coli, its symptoms and how to prevent infection. Here’s a quick Q&A to help clear things up for you.

What is E. coli?
E. coli is a kind of bacterium called Escherichia coli that lives in the digestive tracts of animals and humans. There are many different strains of E. coli bacteria, and for the most part, many of them are harmless. But some strains can cause extreme abdominal discomfort, diarrhea, bloody stools and vomiting — while others strains can lead to urinary tract infections, respiratory illnesses, anemia, kidney failure and even death.

Where does it come from?
Contaminated food:
The most common way people in the U.S. become infected with E. coli is from eating contaminated food. In fact, the CDC estimates that 85 percent of E. coli infections come from ingesting infected food or water. Because E. coli bacteria live in the intestines of healthy animals, like cows, it is possible for processed meats to become contaminated. If the contaminated meat is not heated to 160°F during preparation, the bacteria can survive and infect you when you eat it.
Raw foods can also carry E. coli. It’s important to check the labels and make sure that all your dairy products are pasteurized, or heated to kill off bacteria before hitting the store shelves. Raw fruits and vegetables can become contaminated if they come in contact with manure or animal feces.

Contaminated water:
While not as common as foodborne E. coli infections, people can also become ill from drinking or ingesting contaminated water that has not been properly treated. And sometimes, accidentally swallowing lake or pool water that has come in contact with human or animal feces can put you at risk for becoming infected with E. coli.

Person-to-person:
E. coli can also be spread from person-to-person if someone does not wash their hands thoroughly after a bowel movement. This is not as common, but it’s especially important for people who work in the restaurant/food preparation industry because they can spread the bacteria from their hands to other objects — including your dinner! I know it’s not a nice thought, but it happens more often than you think, so it sounds simple, but washing your hands is one of the easiest ways to prevent all kinds of infections.

What are the symptoms?
Symptoms usually start 3-4 days after exposure to the bacteria and can include:

• Stomach cramps
• Diarrhea
• Bloody stools
• Nausea
• Vomiting
• Mild fever
• Dehydration

Who is at risk?
People of all ages can become infected with E. coli, but the risk for serious complications is higher for young children, the elderly and those with compromised immune systems or underlying health problems.

How is it treated?
E. coli infections will usually clear on their own in about a week in a healthy person and treatment involves resting and staying hydrated. Often, people just assume they have a stomach bug and don’t go to the doctor, so they don’t know that E. coli caused their illness, but a simple stool test can diagnose the condition. As a rule of thumb, you should contact your physician any time there is blood in your stool.

• How can E. coli infection be prevented?
  Wash your hands thoroughly after using the bathroom and before preparing or eating food;
• Cook meats thoroughly at a temperature of at least 160°F/70°C (use a thermometer to test the meat if you’re not sure);
• Do not drink raw milk, unpasteurized dairy products, and unpasteurized juices (like fresh apple cider);
• Avoid swallowing water when swimming or playing in lakes, ponds, streams or swimming pools;
• When traveling abroad to countries that may have unsafe drinking water, don’t drink tap water or get ice in your drinks. Also, avoid raw fruits and vegetables, except those with skin that you can peel yourself;
• Wash your hands often, and always wash them after you use the bathroom or change diapers — it’s the best way to prevent infection with any bacteria.

Dr. Cynara Coomer is an assistant professor of surgery specializing in breast health and breast cancer surgery at Mount Sinai Medical Center in New York City. She is a FOX News Health contributor providing medical expertise on a variety of topics in cancer research with a focus on women’s health, breast diseases and tips for healthy breasts at any age.

   Dear Dr. Yvonne,
What are the risks to having sex in a swimming pool, if any?
Marissa

Dear Marissa,
While seemingly carefree, it’s important to note that pool sex makes for riskier sex.  Pregnancy can happen any time semen is spilled in the vagina or near the vulva, so a condom should be used. Yet, note that water can wash away spermicide and seep between the condom and penis, causing slippage.

Other factors to be aware of: Chemicals, salt, and bacteria in the water can be forced into the rectum or vagina during sex, possibly causing irritation, infection and temporary dryness. 

Oil-based products, as well as chlorine, cause condoms to deteriorate.  
 
Lovers should also be wary of rough pool edges that can cause discomfort and scratching, and stay out of the water if they’ve had too much to drink.

Dr. Yvonne Kristín Fulbright is a sex educator, relationship expert, columnist and founder of Sexuality Source Inc. She is the author of several books including, “Touch Me There! A Hands-On Guide to Your Orgasmic Hot Spots.”