thDay - TUESDAY, March 9 (HealthDay News) -- Colon cancer survivors who are moderately or severely obese face tougher survival odds following treatment compared with their normal-weight peers, a new study reveals.

HealthDay - MONDAY, March 1 (HealthDay News) -- There appears to be a back-and-forth link between depression and obesity, say researchers who reviewed the findings of 15 studies that included nearly 59,000 people.

African trucking routes, long known as pathways for spreading HIV across borders, have been drawn in new maps that also direct drivers to clinics that treat AIDS, a spokeswoman said Wednesday.

HealthDay - TUESDAY, March 9 (HealthDay News) -- People with a particular genetic trait are at much higher risk of developing lung cancer from exposure to secondhand smoke than others, even if they rarely come into contact with it, a new study finds.

Reuters - Young people who use marijuana (cannabis) are at increased risk of suffering hallucinations, delusions or other reality-distorting psychoses. And the more time that's passed since first use, the higher the risk.

Britain announced Tuesday one million pounds in aid to South Africa for the purchase of condoms to tackle HIV and AIDS in the world's worst-affected country ahead of the 2010 World Cup.

HealthDay - TUESDAY, March 2 (HealthDay News) -- Asthma rates are increasing across the United States, a new government study shows, but certain states have significantly lower rates of the respiratory disease.

Researchers said Tuesday that papaya leaf extract and its tea have dramatic cancer-fighting properties against a broad range of tumors, backing a belief held in a number of folk traditions.

Young people who smoke cannabis or marijuana for six years or more are twice as likely to have psychotic episodes, hallucinations or delusions than people who have never used the drug, scientists said on Monday.

Although studies in Africa have shown that circumcision can lower the spread of HIV among heterosexuals, it may not do much to prevent infections among gay and bisexual men in Western countries, a new study suggests.