Cancer is a large group of diseases that can start in almost any organ or tissue of the body when abnormal cells grow uncontrollably, and go beyond their usual boundaries to invade adjoining parts of the body. According to the World Health Organization (WHO), it is the second most common cause of death globally, accounting for millions of deaths every year. Lung, prostate, colorectal, stomach and liver cancer are the most common types of cancer in men, while breast, colorectal, lung, cervical and thyroid cancer are the most common among women. However, these are not necessarily the deadliest forms of cancer.

What makes cancer the deadliest depends upon how many people have it and what percentage of those people actually survive. Cancer researchers determine this on the basis of five-year relative survival. This is the percentage of people who are expected to survive the effects of a given cancer, excluding their risk of other possible causes of death, for five years past a diagnosis. It is also important to note that what makes cancer really deadly is that practically no cure for it. A cure for cancer would imply that there are no cancerous cells remaining in the body.

Here are the 5 deadliest cancers in the U.S., according to SEER five-year relative survival data for cases diagnosed between 2014 and 2020.

1. Pancreatic cancer occurs when cells in your pancreas, a gland in your abdomen that aids digestion, mutate and multiply out of control, forming a tumour. Major risk factors include smoking, obesity, diabetes, chronic pancreatitis, certain genetic mutations and environmental chemical exposure.

2. Esophageal cancer develops in the oesophagus, which is the tube that connects your throat to your stomach.

3. Liver cancer and intrahepatic bile duct cancer originate in the liver or bile ducts, often linked to hepatitis infections, heavy alcohol use, obesity, and aflatoxin exposure.

4. Lung and bronchus cancer primarily caused by smoking, secondhand smoke, and environmental pollutants, affects the lungs and airways, making it the leading cause of cancer death in the US.

5. Acute myeloid leukaemia (AML) is an aggressive blood and bone marrow cancer that progresses rapidly, often linked to genetic mutations, radiation exposure, and certain chemicals.

ALSO READ: Why Are Lifestyle Factors Making Millennials Vulnerable To Cancer?

Michigan health officials say that they may have identified the possible source behind one of the largest Cyclosporiasis outbreaks the state has ever recorded. Thousands of people were sickened by a parasitic infection that can cause severe, watery, or even “explosive” diarrhea.

Source Behind Cyclospora Outbreak Traced

On July 13, the Michigan Department of Health and Human Services (MDHHS) announced preliminary findings from its investigation point to lettuce or other salad greens as the possible source of Cyclospora outbreak.

However, officials stressed that the investigation is in progress, and no specific product, grower, distributor, or supplier has yet been identified for certain.

Health officials also interviewed more than 1,000 patients to identify common exposures.

Early analysis also repeatedly identified lettuce and salad greens as foods consumed before illness, prompting the state to issue precautionary guidance while the investigation continues.

"Although we do not have a definite product identified as the source of the outbreak, we want to let Michiganders know what we have learned so far so they can take steps to protect their families," said Dr. Natasha Bagdasarian, Michigan's chief medical executive, in a state statement.

Also read: As Cyclospora Cases Surge In The US, Expert Explains Why India's Monsoon Raises Risk Of The Parasitic Infection

Cyclospora Cases Continue To Surge

The outbreak has continued to expand at an extraordinary pace since late June. As of July 13, Michigan reported 2,640 cases of Cyclosporiasis, with 44 hospitalizations.

No deaths have been reported so far. The number represents a dramatic increase from the state's usual annual number, which is around 40 to 50 cases.

Preventing Cyclospora

Cyclospora is a parasite that infects people after they consume food or water contaminated with human feces containing the parasite's eggs (oocysts).

Although the illness is usually not life-threatening, it can cause prolonged diarrhea, stomach cramps, nausea, fatigue, bloating, and weight loss.

According to recent reports, fresh produce like salad greens and lettuce are being considered the most common source of infection, though contaminated water can also spread the parasite.

Also read: Explosive Diarrhea Parasite Spreads Across US: Why CDC Is Unable To Find The Source?

Health officials have advised people to avoid fresh produce. Previous Cyclospora outbreaks in the US have frequently been linked to imported fresh produce, including:

• Basil

• Cilantro

• Mesclun lettuce

• Raspberries

• Snow peas

How To Clean Fresh Produce Safely?

While washing produce cannot eliminate all risks, experts say it can reduce contamination. They advised washing fruits and vegetables thoroughly under clean running water and washing hands before and after handling fresh produce.

According to the Michigan Department of Health and Human Services, cooking produce whenever possible during an active outbreak is crucial, as heating food to at least 158°F (70°C) kills Cyclospora.

For specific produce, it suggested:

• Cilantro and basil: Separate the leaves and rinse each thoroughly under running water.

• Green onions: Trim off the roots, remove the outer layer, and rinse well.

• Snow peas: Rub the surface gently while washing under running water.

• Raspberries: Because of their delicate, uneven surface, raspberries are difficult to clean thoroughly. Cooking them in pies or jams is safer. Freezing may reduce the number of parasites but is unlikely to eliminate them completely.

• Leafy greens: If possible, choose whole heads of lettuce instead of bagged salad mixes. Discard the outer leaves and wash the remaining leaves under running water before eating.

Due to climate change, the range of disease-carrying ticks across Canada have increased. Health experts have recently warned about a lesser-known infection that is spreading across the country rapidly. It is called anaplasmosis.

For years, Lyme disease has dominated conversations around tick bites. Experts are now saying that another illness transmitted by the same black-legged tick is spreading into new regions as warmer temperatures create favorable conditions for ticks to thrive.

Tick-Borne Infection Plagues Canada

The warning comes after a recently published report in the Canadian Medical Association Journal (CMAJ) highlighted anaplasmosis as an emerging disease in Canada. Experts urged healthcare providers to diagnose it early as delayed treatment can lead to severe complications.

The report described a patient who developed heart inflammation (myocarditis), after contracting the infection, highlighting the fact that while many cases are mild, some can become life-threatening.

What Is Anaplasmosis?

Anaplasmosis is caused by the bacterium Anaplasma phagocytophilum. It is transmitted through the bite of infected black-legged ticks (Ixodes scapularis) and western black-legged ticks (Ixodes pacificus).

Unlike Lyme disease, which primarily affects the skin, joints and nervous system, anaplasmosis infects white blood cells, weakening the body's immune system.

The symptoms of anaplasmosis commonly develop within one to two weeks after a tick bite and often resemble the flu. They include:

• Fever and chills
• Severe headache
• Muscle aches
• Fatigue
• Nausea or loss of appetite

Also read: Bella Hadid Opens Up About Challenges Of Living With Lyme Disease

Why Anaplasmosis Cases Are Rising In Canada?

Warmer and longer spring and summer and shorter winters are creating the ideal breeding grounds for black-legged ticks. These ticks are expanding farther north into regions where they previously could not survive.

At the same time, warmer conditions are extending the period during which ticks remain active. Public health officials say that ticks can now be active whenever temperatures remain consistently above freezing.

The Public Health Agency of Canada has reported that the geographic range of ticks carrying diseases such as Lyme disease, anaplasmosis and babesiosis continues to expand across several provinces, including Ontario, Quebec, Manitoba, New Brunswick and parts of Atlantic Canada.

Early Detection And Diagnosis Are The Key

Although many people recover completely with prompt treatment, anaplasmosis, if left untreated, can cause serious complications affecting the lungs, kidneys, nervous system and heart.

Older adults, people with weakened immune systems and those whose treatment is delayed face the highest risk of severe illness.

Canadian health authorities recommend that treatment begin as soon as doctors suspect anaplasmosis rather than waiting for laboratory confirmation, since early intervention significantly improves outcomes.

Protecting yourself during tick season is one of the ways to ward off risk of infection. Health officials recommend several simple precautions to reduce the risk of tick bites:

• Wear long sleeves and long pants in wooded or grassy areas.
• Apply insect repellents containing DEET or icaridin.
• Perform thorough tick checks after spending time outdoors.
• Remove attached ticks immediately.

As Canada's climate continues to warm, experts say the country's tick-borne disease landscape is changing rapidly. While Lyme disease remains the most recognized threat, physicians warn that anaplasmosis is no longer a rare infection.

A new safety analysis has found that Wegovy, the recently launched blockbuster weight loss medication containing semaglutide, may cause a rare but dangerous eye condition that can lead to sudden and permanent vision loss.

The analysis, published in the British Journal of Ophthalmology, compared Wegovy, semaglutide tablets and other GLP-1 drugs like Ozempic by examining more than 30 million reports from the U.S. Food and Drug Administration's Adverse Event Reporting System (FAERS) submitted between 2017 and 2024.

Scientists found a safety signal that linked semaglutide medicines to non-arteritic anterior ischemic optic neuropathy (NAION), also known as eye stroke.

Wegovy More Likely To Cause Blindness Than Ozempic

The signal appeared to be nearly five times stronger for Wegovy than for Ozempic, despite both medicines containing the same active ingredient, semaglutide.

NAION occurs when blood flow to the optic nerve suddenly gets reduced, causing damage to the nerve responsible for transmitting visual information from the eye to the brain. The patient experiences painless vision loss in one eye.

While some patients experience partial improvement, the vision loss is frequently permanent. There is currently no proven treatment to reverse the damage.

Researchers state that the findings do not prove that Wegovy causes NAION. Instead, they observe a typical signal, meaning an unexpected pattern observed in a large safety database that requires immediate further investigation.

Such pharmacological analyses are useful for identifying rare and adverse side effects that may not emerge during clinical trials.

Why Wegovy Poses A Greater Risk Of Rare Blindness?

Also read: Novo Nordisk Launches Awiqli In India: All About The World's First Once-Weekly Insulin

The stronger link observed with Wegovy and NAION compared with Ozempic has also raised new questions. Both drugs contain semaglutide, but Wegovy is prescribed at higher doses for obesity, while Ozempic is used to treat type 2 diabetes.

Researchers say that factors such as higher dosing, differences in patient populations, or underlying health conditions could help explain the disparity, although more research is needed.

The latest findings build on growing scientific interest in the potential eye-related risks of GLP-1 receptor agonists.

Previous observational studies have also reported an increased risk of NAION among semaglutide users, prompting regulators in Europe to add the condition as a very rare side effect to semaglutide product information last year.

Health experts emphasize that patients should not stop taking Wegovy without consulting their healthcare provider. For most users, the drug's benefits in managing obesity and reducing associated health risks are likely to outweigh the extremely rare risk of developing NAION.

However, anyone taking Wegovy who experiences sudden blurred vision or loss of vision should seek immediate medical attention.

Wegovy Manufacturer Explores Semaglutide Implant

The GLP-1 medication industry is in a boom. Novo Nordisk, the maker of GLP-1 medicines like Ozempic and Wegovy, is currently exploring a new way to deliver weight-loss treatment that could reduce the need for weekly injections.

The implant, known as NPM-139, is a miniature device developed using Vivani Medical's proprietary NanoPortal technology. Rather than requiring patients to inject semaglutide every week, the tiny implant is placed beneath the skin and slowly releases the medication over an extended period.

If successful, it could mark a significant step toward making GLP-1 drug more convenient for people living with obesity.