Explanation

The characteristic of the organism that led to the severest form of the disease is indeed its virulence.

It refers to the degree of pathogenicity of a microorganism, meaning its ability to cause disease.

Organisms with high virulence are more likely to cause severe illness and potentially fatal outcomes.

Virulence factors can vary depending on the type of organism involved. 

Explanation

BCG vaccine is given at birth or as soon as possible thereafter.

It should not be given to children who have signs and symptoms of AIDS.

One dose of 0.05 ml.

If there is no scar at the injection site six weeks after a BCG immunization, the injection must be repeated.

This timing helps protect against tuberculosis (TB) in infants, as TB can be particularly severe in this age group.

Explanation

Enforcement of traffic laws serves as a fundamental pillar in preventing traffic accidents due to several logical reasons:

• Deterrence of Risky Behavior:
• Promotion of Compliance:
• Modification of Driver Attitudes:
• Identification and Removal of Hazardous Drivers: 
• Education and Awareness:

Additional information:

While all the options listed are important in promoting road safety,

Enforcing traffic laws ensures that drivers adhere to speed limits,

Follow traffic signals, avoid reckless driving behaviors,

And maintain safe distances from other vehicles.

Explanation

Measles is a highly contagious disease caused by a virus.

It spreads easily when an infected person breathes, coughs, or sneezes.

It can cause severe disease, complications, and even death. 

It can affect anyone but is most common in children

Additional information:

Malaria is not a viral disease

it's caused by a protozoan parasite of the genus Plasmodium. 

Explanation

Springs are natural sources of water that emerge from underground aquifers.

Due to filtration through layers of rock and soil, spring water is often considered one of the purest forms of natural water

It typically contains fewer contaminants compared to other sources such:

• as rivers,
• rainwater, 
• wells,

Making it a sought-after choice for drinking water.

Explanation

Calcium is considered a micronutrient because it is required in small quantities.

It plays a crucial role in various physiological functions, including:

• bone and teeth health
• muscle function
• nerve transmission
• blood clotting.

They support various metabolic functions.

It includes:

• vitamins (such as vitamin C, vitamin D, and vitamin B12) 
• minerals (such as iron, zinc, calcium, and magnesium).

Additional information:

Macronutrients needed in larger quantities, including:

• carbohydrates
• proteins
• fats

It provides energy and serves as a building block for bodily tissues.

Explanation

Completed family size (CFS) is a cohort measure of fertility.

It indicates the average number of children a woman aged 30 in that year is projected to have.

The total fertility rate (TFR) is a period measure of fertility.

Explanation

By the time he was thirty, he had won many tournaments."

جب وہ تیس سال کا تھا، اس نے بہت سے ٹورنامنٹ جیت لیے تھے۔"

***

"had won" is used in this sentence to convey the past perfect tense. 

This sentence, "By the time he was thirty" establishes a point in the past.

The action of winning tournaments ("had won") is placed before this past point in time

Explanation

The influenza pandemic occurs every 7 to 10 years and is known as a cyclic or periodic distribution

This cyclical pattern is characteristic of certain infectious diseases,

including influenza, which exhibits periodic outbreaks or epidemics on a global scale.

Explanation

Near the historic monument, there is a bridge over the Thames River.

تاریخی یادگار کے قریب دریائے ٹیمز پر ایک پل ہے۔

The preposition "over" is used here to indicate the spatial relationship between the bridge and the Thames River.