Killer on the prowl

Heart of the matter

Researchers have focussed on folic acid as a potential heart cure

THE CARIBBEAN

Attacking heart attacks

An enzyme displays belligerence towards cholesterol

Plaguing the question

Cooling agents

Bacterial transfers

Going for the kill

Virus vs virus

Can the deadly dengue be controlled by injecting its carrier mosquito with another virus?

On alert

Grass is greener

Chameleon effect

TANZANIA

Mystery malady

Ruling over worms

The length of worms is determined by the hosts

Large-hearted men

Pace breakers

The use of cellular phones can damage heart pacemakers

Genetic thieves

Soft-hearted

Tracking syphilis

Knit me an artery!

Hearty duo!

Chocolate bar and red wine -- a great combination to keep the heart ticking strong

Attention heart patients

Puppy problem

PESTS ATTACK