1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
denis23 [38]
2 years ago
8

How effective was Jonas Salk’s initial testing of the polio vaccine?

Biology
1 answer:
leva [86]2 years ago
6 0

Answer:it was very effective.

Explanation:

According to report in America 1954, Salk conducted a national study, with over a million paediatric subjects wish yielded a positive outcome and on 12 April 1955, the vaccine was considered safe and efficacious. in 1955, the vaccines was used for over 29,000 cases of poliomyelitis in the US and the infection rate reduced to less than 6,000. This made Salk vaccine more recognized and it was speedily adopted worldwide reaching almost 90 countries in less than 2 years after it mass production.

You might be interested in
What enzyme makes mRNA?
Zina [86]
Answer: RNA polymerase II hope this helps if not comment back and I’ll reply
5 0
3 years ago
Read 2 more answers
What is acid rain and how is it a problem to oceans, rivers, lakes, ponds, etc.
amid [387]

Answer:

Any form of precipitation like rain, snow, fog, hail, and even dust that has acidic components. When the acidity of a lake  increases, the water becomes clearer and the all the animals decrease.

Explanation:

4 0
3 years ago
Study the agencies and policies above concerning environmental policies. You are part of a group of concerned citizens which is
Ede4ka [16]
 THE ANSWER IS (D )WWF
5 0
3 years ago
Read 2 more answers
Milankovitch cycles ________. select one:
Vitek1552 [10]
<span>The Milankovitch theory explains the long term climate change and the </span>
Milankovitch cycles describe the effects of changes as a result of climate change. There are three Milankovitch cycles:about Earth's Eccentricity (the shape of the Earth's orbit around the Sun), Axial tilt (the inclination of the Earth's axis in relation to its plane of orbit around the Sun) and precession (the Earth's slow wobble as it spins on axis).
According to this, Milankovitch's cycles <span>are changes in earth's rotation and orbit around the sun that may trigger climate variation. (B).</span>


6 0
3 years ago
is a coral reef formed by the abiotic movement of minerals, as in the rock cycle? or is it formed by the biotic cycling of carbo
VikaD [51]
movement of minerals
5 0
3 years ago
Other questions:
  • What is the name of the scientific method has an independent variable, dependent variable, constants, and control group?
    11·1 answer
  • Which of the following body part has involuntary muscles arm face intestine leg
    14·2 answers
  • Which instrument is used to observe the cell and in that box.A.)electronic microscope B.)telescope C.)hand lens ( )​
    12·1 answer
  • What does the Diagram of the water intake by a Bryophyte look like?
    8·1 answer
  • What would happen to the cell or organism if the protein is changed as a result of the mRNA being produced incorrectly?
    14·2 answers
  • Which characteristic is not necessary for survival of the organism but is needed for the survival of the species
    14·1 answer
  • The substantial-capacity test states that an individual should have the mental capacity to understand that an act is wrong or co
    6·2 answers
  • How can tornadoes and/or thunderstorms impact human, plant, or animal life?
    15·2 answers
  • Describe Hydrogen Bonding.<br><br><br> BEST ANSWER GETS BRAINLIEST
    6·1 answer
  • What is the end result of cytokinesis from a cell undergoing mitosis?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!