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Influenza Is Rising — COVID Is Still Circulating. Test Frequently
Influenza activity is rising as respiratory virus season accelerates, while COVID-19 continues to circulate at the same time. Because these two viruses often cause nearly identical early symptoms—fever, body aches, fatigue, sore throat, and cough—timely testing has become essential. The article emphasizes the importance of having combined at-home influenza and COVID tests readily available and using them immediately at symptom onset, rather than waiting several days.
Early i

David S. Klein, MD FACA FACPM
5 days ago4 min read


Lactoferrin Containing Colostrum: Targeted Support for Sleep, Immunity, and Respiratory Health
Lactoferrin-rich colostrum occupies a unique niche at the intersection of mucosal immunity, systemic inflammatory control, and sleep regulation. By combining the broad matrix of colostrum with the targeted antiviral, antibacterial, and immunomodulatory activity of lactoferrin, these preparations can reduce the burden of upper respiratory infections, support resilient immune function, and modestly improve sleep quality in selected populations. As with any therapeutic nutrient,

David S. Klein, MD FACA FACPM
Dec 1, 20256 min read


Be Aware of the Potential Risks of Pertussis Infection. Whooping cough, Knowing the Enemy. The 100-day Cough. Part II
A little extra information on whooping cough. The more you know, the better and safer you and your family will be

David S. Klein, MD FACA FACPM
Jan 21, 20256 min read


Unveiling the Looming Threat: Understanding the Surge of Pertussis Infections and Preparing for the Next Potential Pandemic. Whooping cough: The 100 day cough.
Whooping cough, known sometimes as "the 100 day cough" is making back and causing problems. In pets, it is Kennel Cough.

David S. Klein, MD FACA FACPM
Jan 14, 20255 min read
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