The experts consulted for this story do not necessarily endorse the products ahead unless otherwise noted.Ever since COVID-19, many of us have taken extra precautions to prevent the spread of germs, whether while traveling or entering highly populated spaces. As travel season gets underway, you may be looking for even more ways to be vigilant in your efforts. Many reviewers who claim to be frequent travelers attribute their illness-free existence to the Nozin Nasal Sanitizer, a compact tool that can be layered into your line of defenses against bacteria.Dr. Geoffrey Trenkle, a board-certified otolaryngologist and founder of the Los Angeles Center for Ear, Nose, Throat and Allergy, explained how effective this product really could be.“The nose serves as a primary entryway for respiratory bacteria and viruses,” he said. And even while the mucous in the nasal cavity is designed to capture and filter particles, Trenkle said “it also provides a surface for pathogens to attach, multiply, and potentially spread to others via droplets or direct contact.”Trenkle said that although this method may be effective against surface-level bacteria, many respiratory viruses replicate deeper in the nasal passages and upper airway, therefore the sanitizer’s reach and impact are naturally constrained.According to Trenkle, this nasal sanitizer and products similar to it rely on antiseptic agents — a 62% alcohol-based antiseptic in the case of the Nozin formula — to lower microbial counts in the front section of the nose.Because the skin inside the nasal cavity is thin and potentially sensitive, and the alcohol is drying, the Nozin formula also contains hydrators like jojoba, as well as vitamin E, which is a trusted ingredient for nourishing skin and preventing moisture loss. These single-use swabs come with a pre-loaded ampule containing the alcohol-based solution that needs to be shaken and cracked before applying the saturated tip inside both nostrils. The brand recommends the nasal sanitizer for daily use or whenever going to places where contamination risk may be high. For many Nozin reviewers, this means before air travel, entering hospitals or crowded venues. “I just returned from a 12-day trip overseas. The trip included a riverboat cruise and multiple crowded bus tours. Lots of people around me were coughing and sneezing. I did not get sick at all,” one Amazon shopper claimed.For the most effective ways to reduce respiratory infections, Trenkle said to practice good hand hygiene, stay away from others when symptomatic, receive appropriate vaccinations, and maintain optimal mucosal health. “Intranasal antiseptics [like the Nozin nasal sanitizer] might have a role in specific settings or for high-risk individuals, but they’re best considered as complementary to primary preventive strategies,” he said.Keep reading to see what other reviewers had to say about the Nozin nasal sanitizer below, or grab a 10-pack before your next trip. Promising Amazon reviews:″Have used this product when traveling internationally every night after traveling all day on a group tour bus as well as planes. Did not get sick.” — Christine Luebbers“Flew back and forth from warm to cold weather 8 times in a two month period. Usually get sick after plane rides where everyone on the plane is sick, which was just about all the flights. Used these sanitizers and was fine after all flights. My new go to!” — Bass of spades“Nice citrus, smell, easy to use, simple instructions. Recommended by my doctor.. use it prior to every flight I take, or if I’m going to be in a crowded venue. Since I’ve been using, I have not had a cold or a virus after flying. Another layer of protection that is not a mask.” — Daniel R. Walker“Outstanding.I just returned from a 12-day trip overseas. The trip included a river boat cruise, and multiple crowded bus tours. Lots of people around me were coughing and sneezing. I did not get sick at all. I will continue to keep this on hand for future trips and crowded venues.” — Ella K.“I use this every time I go to work. I work in a hospital and I truly feel this has helped me not contract any airborne illness. My previous hospital the whole Labor and delivery department along with NICU would use this prior to work. I feel this absolutely works.” — BargainShopperIf you want to learn about more doctor-recommended ways to stay healthy while traveling, take a look at some of the products below, previously reported on by the HuffPost shopping team:AmazonAntibacterial soap sheetsIt may go without saying, but according to experts, regularly washing your hands is the most important thing you can do while traveling in order to prevent getting sick. Dr. Sterling N. Ransone Jr., full-time family physician in Deltaville, Virginia, previously said that he always travels with sheets of camping soap, which he said are lightweight and very useful. We found these portable sheets of soap that are antibacterial and formulated with nourishing plant extracts. All you need is a little bit of water to turn one of these sheets in a rich foaming lather. The price below is for three 100-sheet packs of soap, however small packs are available as well as different scents. AmazonA 20-pack of of NIOSH-certified N95 masksDr. Allison Edwards, a family practitioner with the online telehealth platform Sesame, said that N95-rated masks are still a good way to reduce the risk of catching a highly contagious respiratory illness like COVID-19. These N95 respirator masks come in a pack of 20 and are made by a Florida-based medical device company. They have also been tested and certified by the National Institute for Occupational Safety and Health for filtering out at least 95% of airborne particles.Amazon30 travel sachets of immunity boosterNearly all of the doctors in a previous story mentioned traveling with vitamin supplements to help keep their immune systems boosted. These individual powder sachets by Emergen-C, which were a former doctor's recommendation — contain 1,000 milligrams of vitamin C and are chock full of antioxidants and electrolytes. This box contains 30 convenient travel sachets in the brand's classic orange flavor, though other flavors are available like raspberry and pink lemonade.As is the case with any supplement, always take with caution and consult with your doctor first before consuming.The original version of this story was published on HuffPost at an earlier date.